Ulmane, Zane, Kristīne Šneidere, and Ainārs Stepens. “DEVELOPMENT OF RETROSPECTIVE LIFE-LONG PHYSICAL ACTIVITY QUESTIONNAIRE: FIRST STAGE”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 7 (May 21, 2019): 153–162. Accessed May 2, 2024. https://journals.ru.lv/index.php/SIE/article/view/3701.