ULRYCH, Wojciech; SYPER-JĘDRZEJAK, Marzena. The strengths and weaknesses of employees 50+ in terms of managing individual performance. Journal of Positive Management, [S. l.], v. 8, n. 2, p. 17–28, 2018. DOI: 10.12775/JPM.2017.008. Disponível em: https://apcz.umk.pl/JPM/article/view/JPM.2017.008. Acesso em: 4 jul. 2025.