Riveros, Oscar Arley, Juan Guillermo Romero, and Jhon Francined Herrera. “Implementation of the K -Neighbors Technique in a Recommender Algorithm for a Purchasing System Using NFC and Android”. INGE CUC 13, no. 1 (January 1, 2017): 9–18. Accessed April 27, 2025. https://ojstest.certika.co/ingecuc/article/view/1038.