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://journals.vu.lt./problemos/article/view/5815. Acesso em: 19 apr. 2025.