LYDEKA, Zigmas. Economic Activity of the Individual and the Evaluation of Motivation. Ekonomika, [S. l.], v. 42, p. 96–114, 1997. DOI: 10.15388/Ekon.1997.16431. Disponível em: https://www.zurnalai.vu.lt/ekonomika/article/view/16431. Acesso em: 20 apr. 2025.