BRETAS, Wagner Vianna; MORAIS, Alline Sardinha Cordeiro; HORA, Henrique Rego Monteiro da; AZEVEDO FILHO, Edson Terra. Knowledge extraction on international markets from patent bases: a study on green patents. Brazilian Journal of Operations & Production Management, [S. l.], v. 16, n. 4, p. 698–705, 2019. DOI: 10.14488/BJOPM.2019.v16.n4.a14. Disponível em: https://bjopm.org.br/bjopm/article/view/767. Acesso em: 4 feb. 2026.