Purchase and sale contracts: guiding bases for the formalization of a legal business. Research, Society and Development, [S. l.], v. 11, n. 16, p. e319111638337, 2022. DOI: 10.33448/rsd-v11i16.38337. Disponível em: https://rsdjournal.org/rsd/article/view/38337. Acesso em: 5 dec. 2025.