HÖFIG, Pedro; ARAUJO-JUNIOR, Cezar Francisco. Terrain slope classes and potential for mechanization to coffee plantation in the state of Paraná. Coffee Science - ISSN 1984-3909, [S. l.], v. 10, n. 2, p. 195–203, 2015. Disponível em: https://coffeescience2.ufla.br/index.php/Coffeescience/article/view/833. Acesso em: 21 oct. 2026.