Tafur, L.A., Ordóñez, G., Millán, J.C., Varela, J.M. and Rebellón, P. 2006. Prevalence of smoking habit in university students at Universidad Santiago de Cali. Colombia Medica. 37, 2 (Nov. 2006), 126–132. DOI:https://doi.org/10.25100/cm.v37i2.423.