Cabezón, C., Vigil, P., Rojas, I., Leiva, M. E., Riquelme, R., Aranda, W. y García, C. (2005). Adolescent pregnancy prevention: An abstinence-centered...
Cassell, M. M., Halperin, D. T., Shelton, J. D. y Stanton, D. (2006). Risk compensation: the Achules' heel of innovations in HIV prevention?....