Guimarães, A., Costa, T.F., Lacerda, A., Pappa, G.L. and Ziviani, N. 2013. GUARD: A Genetic Unified Approach for Recommendation. Journal of Information and Data Management. 4, 3 (Sep. 2013), 295. DOI:https://doi.org/10.5753/jidm.2013.1499.