Valverde-Abarca, Anthony, Mónica Madrigal-Valverde, Marlen Camacho-Calvo, Adones Zambrana-Jiménez, and Leonardo López. “Effect of Breed Composition on Sperm Quality of Boar”. Agronomía Mesoamericana 29, no. 3 (September 1, 2018): 485-506. Accessed February 17, 2019. https://revistas.ucr.ac.cr/index.php/agromeso/article/view/32445.