1. Abdul‐Rahman, H., Yahya, I. A., Berawi, M. A., & Wah, L. W. (2008). Conceptual delay mitigation model using a project learning approach in practice. Construction Management and Economics, 26(1), 15-27.
2. Abraham, S. (2019). Are the public subsidies of professional sports stadiums worth the cost of building them? CMC Senior Theses, Claremont Colleges.
3. Adam, A., Josephson, P.-E. B., & Lindahl, G. (2017). Aggregation of factors causing cost overruns and time delays in large public construction projects. Engineering, Construction and Architectural Management, Vol. 24, No. 3, pp. 393-406.
4. Agyekum-Mensah, G., & Knight, A. D. (2017). The professionals’ perspective on the causes of project delay in the construction industry. Engineering, Construction and Architectural Management,Vol. 24, No. 5, pp. 828-841.
5. Akbari, H., & Davari, D. (2002). Privatization management, aria industrial research center and dersa management consulting company. : Athena Publishing.
6. Akinsiku, O. E., & Akinsulire, A. (2012). Stakeholders' perception of the causes and effects of construction delays on project delivery. Journal of Construction Engineering and Project Management, 2(4), 25-31.
7. AlGheth, A., & Sayuti, M. I. (2019). Review of delay causes in construction projects. Paper presented at the AWAM International Conference on Civil Engineering, Springer, Cham, pp. 429-437.
8. Anbarzadeh, S., Azadi, S., & Joharian, J. (2019). Identifying and prioritizing the causes of delays in the Kermanshah urban train project using the combined AHP and TOPSIS fuzzy techniques. Paper presented at the Second International Conference on Industrial Management and Engineering in the Asrenovin, Tehran. (in persian)
9. Aziz, R. F., & Abdel-Hakam, A. A. (2016). Exploring delay causes of road construction projects in Egypt. Alexandria Engineering Journal, 55(2), 1515-1539.
10. Chen, G.-X., Shan, M., Chan, A. P., Liu, X., & Zhao, Y.-Q. (2019). Investigating the causes of delay in grain bin construction projects: the case of China. International Journal of Construction Management, 19(1), 1-14.
11. Creswell, J. W., & Miller, D. L. (2000). Determining validity in qualitative inquiry. Theory into Practice, 39(3), 124-130.
12. Dudangeh, R. (2018). Reasons for delays in construction projects (Vol. 36). Tehran: Nedaye Karafarin Publishing. (in persian)
13. Durdyev, S., Omarov, M., & Ismail, S. (2017). Causes of delay in residential construction projects in Cambodia. Cogent Engineering, 4(1), 1291117.
14. Elawi, G. S. A., Algahtany, M., & Kashiwagi, D. (2016). Owners’ perspective of factors contributing to project delay: case studies of road and bridge projects in Saudi Arabia. Procedia Engineering, 145, 1402-1409.
15. Fateh, M. H., & Valipour, A. (2017). Investigating the causes of delays in construction projects with emphasis on existing problems in human resource management. Paper presented at the Second International Conference on Civil Engineering, Architecture and Crisis Management, Tehran. (in persian).
16. Ghaedi, A., Ghafouri, F., & Kargar, G. A. (2015). Investigating the role of Athletics sport on social development indicators. Applied Research in Sports Management, 5(1), 35-47. (in Persian).
17. Giahchi, S., & Khazaini, G. (2017). Planning the time and cost of the project for the construction of a sauna and swimming pool complex in the form of an EPC contract and examining its risks, the third annual conference on architecture, urban planning and urban management research, Shiraz, Safiran Rah Mehrazi Architecture and Urban Planning Institute. from https://civilica.com/doc/650965/. (in persian)
18. Gunduz, M., & Tehemar, S. R. (2020). Assessment of delay factors in construction of sport facilities through multi criteria decision making. Production Planning & Control, 31(15), 1291-1302.
19. Gurkhani, I., Mohammadi, M., & Sabet, A. (2019). Identifying the effective factors in the occurrence of delays and cost increases in projects Mehr Housing: Case study. Paper presented at the First National Conference on Management, Ethics and Business, Shiraz. (in Persian).
20. Hadizadeh, M.(2019). Review and presentation of proposals on delays and how to present delays in civil projects. Paper presented at the 4th International Conference on New Research in Civil Engineering, Architecture, Urban Management and Environment, Karaj. (in Persian).  
21. Haghighat, M. H., & Ghorbani, A. (2009). Modeling the delays of construction projects based on neural network to determine the share of effective factors in the occurrence of delays in construction projects in Tehran. Civil and Project Monthly, 1, 37-90. (in Persian).
22. Jafari, E. (2010). Investigating the reasons for delays in the country's sports development projects. (Unpublished master᾽s thesis). North University, Amol. (in Persian).
23. Javadian, S. R., Falah, A., & Mirjalili, A. (2017). Investigating the performance of fuzzy logic in risk management of sports construction projects. Paper presented at the 4th National Conference on Applied Research in Civil Engineering, Architecture and Urban Management, Tehran.
24. Khanzadi, M., Dabirian, S., & Piroozfar, R. (2011). Investigating the reasons for the delay of development projects in Iran and ways to get out of it. Paper presented at the Second International Conference on Strategic Project Management, Tehran. (in Persian).
25. Kumar, H., Manoli, A. E., Hodgkinson, I. R., & Downward, P. (2018). Sport participation: From policy, through facilities, to users’ health, well-being, and social capital. Sport Management Review, 21(5), 549-562.
26. Kvale, S., & Brinkmann, S. (2009). Interviews: Learning the craft of qualitative research interviewing. London: Sage.
27. Mahyari, H. (2006). Important Cases of Contract Contract Claims. Tadbir Magazine, (85), 27. (in persian)
28. Malahi Koohi, M., Ramezani Nejad, R., Javadipour, M., & Yasouri, M. (2014). Investigating the factors affecting the development of championship sports in the provinces of iran and presenting a proposed model (Unpublished master᾽s thesis). University of Guilan, Rasht, Iran. (in Persian).
29. Mittal, Y. K., Paul, V. K., Rostami, A., Riley, M., & Sawhney, A. (2020). Delay factors in construction of healthcare infrastructure projects: a comparison amongst developing countries. Asian Journal of Civil Engineering, 21(4), 649-661.
30. Okoro, C. O., Mansur, S. A., Yahya, K., Igwe, U. S., & Obiefuna, J. I. (2020). Impact of Skilled Workforce Induced Delay on Project Delivery and Construction Sustainability in Nigeria. International Journal of Business and Technology Management, 2(1), 15-26.‏
31. Rahanjam, A., & kochaki, M. (2018). Investigating the causes of delay in construction projects and providing solutions (Vol. 55). Tehran: Sanjeshodanesh. (in persian)/
32. Rezaei, A. (2016). Investigating the necessary contexts in applying the fourth factor (project management) in the country's sports projects (Unpublished master᾽s thesis). Shahid Beheshti University, Tehran, Iran.
33. Savadi, M., Hemmatinejad, M. A., Gholizadeh, M. H., & Gohar Rostami, H. (2015). Designing a model for the development of public sports in Hormozgan province. Quarterly Journal of Sports Management and Development, 2, 87-102. (in Persian).
34. Schulenkorf, N., & Siefken, K. (2019). Managing sport-for-development and healthy lifestyles: The sport-for-health model. Sport Management Review, 22(1), 96-107.
35. Suri, A., Shabani Moghaddam, K., & Suri, R. (2016). Relationship between physical activity and quality of life of elderly women in Kermanshah province. Applied Research in Sports Management, 4(4), 75-84. (in Persian).
36. Tavassoli, G. (2013). Sociological theories. Tehran: Samt Publications.
37. Tehemar, S. R. S. (2018). Evaluation of delay’s causes and effects on sport facilities. Masters of Science Project, College of Engineering QATAR UNIVERSITY.
38. Yanow, D., & Schwartz-Shea, P. (2006). Interpretation and method: Empirical research methods and the interpretive fun. M.E.sharpe, Armonk, New York, London, England.

Yaseen, Z. M., Ali, Z. H., Salih, S. Q., & Al-Ansari, N. (2020). Prediction of risk delay in construction projects using a hybrid artificial intelligence model. Sustainability, 12(4), 1514.