DAMIDAVIČIUS, Matas. Sociological Investigation of Labour Intensity. Problemos, [S. l.], v. 7, p. 79–87, 1971. DOI: 10.15388/Problemos.1971.7.5815. Disponível em: https://www.journals.vu.lt/problemos/article/view/5815.. Acesso em: 6 may. 2024.