UNJBG, C. & D. EL MUNDO AYMARA Y VAN KESSEL. Ciencia y Desarrollo, [S. l.], n. 2, p. 118–120, 2019. DOI: 10.33326/26176033.1995.2.56. Disponível em: https://revistas.unjbg.edu.pe/index.php/cyd/article/view/56. Acesso em: 28 oct. 2021.