Soto-Pinto, Lorena, Yolanda Romero-Alvarado, Javier Caballero-Nieto, and Gerardo Segura Warnholtz. 2001. “Woody Plant Diversity and Structure of Shade-Grown-Coffee Plantations in Northern Chiapas, Mexico”. Revista De Biología Tropical 49 (3-4):977–987. https://revistas.ucr.ac.cr/index.php/rbt/article/view/18046.