Ayala Guanga, L., Rodas Carpio, R., Almeida, A., Torres Inga, C. y Nieto Escandón, P. 2018. Influence of Penile Spicules of Covies(Cavia porcellus)on their Sexual Behavior, Fertility and Sperm Quality. Revista de Producción Animal. 29, 3 (ene. 2018), 36-42.