GENDROLIS, Edmundas. Social Activity of Man in Pre-Class Society. Problemos, [S. l.], v. 28, p. 5–16, 1982. DOI: 10.15388/Problemos.1982.28.6323. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/6323. Acesso em: 28 oct. 2025.