MITRIKAS, Alfonsas Algimantas. The Typologization Problem of Free Time. Problemos, [S. l.], v. 16, p. 32–38, 1975. DOI: 10.15388/Problemos.1975.16.5590. Disponível em: https://www.journals.vu.lt/problemos/article/view/5590.. Acesso em: 4 may. 2024.