SALDAÑA, A. M. M. ., M. . TORRES, O. . POGREBNYAK, M. . MORENO, and G. GUZMÁN. “THE GRP METHODOLOGY: AN APPROACH TO BUILD ROUTES BASED ON POINTS OF INTEREST”. Journal of Mobile Multimedia, vol. 10, no. 3-4, Aug. 2014, pp. 273-9, https://journals.riverpublishers.com/index.php/JMM/article/view/4577.