STRASBURGER, Aleksander; ZAJKOWSKA, Olga. WHO WANTS TO WORK LONGER?. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 14, n. 2, p. 220–228, 2013. Disponível em: https://qme.sggw.edu.pl/article/view/3624. Acesso em: 3 kwi. 2025.