SILVEIRA, F. da; MACHADO, F. M.; ROMANO, L. N.; AMARAL, F. G.; RUPPENTHAL, J. E. Strategy for the development of agricultural machinery: importance of patent analysis. Brazilian Journal of Operations & Production Management, [S. l.], v. 15, n. 4, p. 535–544, 2018. DOI: 10.14488/BJOPM.2018.v15.n4.a7. Disponível em: https://bjopm.emnuvens.com.br/bjopm/article/view/513. Acesso em: 2 dec. 2021.