BRETAS, W. V.; MORAIS, A. S. C.; HORA, H. R. M. da; AZEVEDO FILHO, E. T. 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.emnuvens.com.br/bjopm/article/view/767. Acesso em: 3 dec. 2021.