1.
Ávila J, Marín V. The Notions of Center, Commutator and Inner Isomorphism for Groupoids. ing.cienc. [Internet]. 2020 Jun. 19 [cited 2024 Nov. 22];16(31):7-26. Available from: https://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/6260