DOBROVOLSKAS, A. Methodological Principles of the Investigation of People’s Welfare. Problemos, [S. l.], v. 21, p. 52–57, 1978. DOI: 10.15388/Problemos.1978.21.6212. Disponível em: https://www.journals.vu.lt/problemos/article/view/6212.. Acesso em: 28 apr. 2024.