Silveira, Franco da, Filipe Machado, Leonardo Romano, Fernando Amaral, and Janis Ruppenthal. 2018. “Strategy for the Development of Agricultural Machinery: Importance of Patent Analysis”. Brazilian Journal of Operations & Production Management 15 (4), 535-44. https://doi.org/https://doi.org/10.14488/BJOPM.2018.v15.n4.a7.