Research Results of a Combined Machine that Increases Productivity in Grain Farming. Global Journal of Science Frontier Research, [S. l.], v. 23, n. D3, p. 21–33, 2023. Disponível em: https://testing.journalofscience.org/index.php/GJSFR/article/view/102715. Acesso em: 4 feb. 2026.