Fullen, Michael A. “The Development of Sustainble Cropping Systems in the Highlands of South-East Asia: General Lessons for Development Projects”. Sociedade & Natureza 1, no. 1 (novembro 3, 2009). Acessado setembro 26, 2022. https://seer.ufu.br/index.php/sociedadenatureza/article/view/9673.