ALEMÁN ESPINOZA, José Wilfredo; RUIZ VARGAS, Mario Rafael; AGUILAR JUAREZ, Ernesto Alexander. Looking back into the development of Chatbots and Natural Language Processing. Reality and Reflection, [S. l.], v. 48, p. 190–206, 2019. DOI: 10.5377/ryr.v48i0.7095. Disponível em: https://www.camjol.info/index.php/RyR/article/view/7095. Acesso em: 6 dec. 2025.