Kruszyńska, E., J. Muracki, M. Siwek, A. Kurtoğlu, M. Zadarko-Domaradzka, E. Zadarko, E. Setiawan, and J. Wallusch. “Students’ Mental Health During the Covid-19 Pandemic Lockdown”. Physical Education of Students, vol. 29, no. 5, Oct. 2025, pp. 340-52, doi:10.15561/20755279.2025.0502.