“Life Satisfaction of Physical Education Teachers in Relation to Teaching One or Two Subjects and to Extracurricular Sports Activities”. Sport i Turystyka Środkowoeuropejskie Czasopismo Naukowe 16, no. 2 (April 3, 2019): 145–157. Accessed September 20, 2026. https://czasopisma.ujd.edu.pl/index.php/sport/article/view/335.