OSTOJ, I. On the validity of the division into formal and informal institutions. Ekonomia i Prawo. Economics and Law, [S. l.], v. 18, n. 1, p. 61–72, 2019. DOI: 10.12775/EiP.2019.005. Disponível em: https://apcz.umk.pl/EiP/article/view/EiP.2019.005. Acesso em: 2 dec. 2024.