A. Siyahtas, D. Harmander Demirel, and E. Serdar, “The Relationship Between Perceived Freedom in Leisure, Perceived Health Outcomes and Psychological Resilience: Physical Activities Participants”, Sportif Bakış: Spor ve Eğitim Bilimleri Dergisi, vol. 12, no. 3, pp. 285–295, Dec. 2025.