Self-esteem, perceived self-efficacy, consumption of tobacco and alcohol in secondary students from urban and rural areas of Monterrey, Nuevo León, México - Maldonado, Raúl Martínez; Pedrão, Luiz Jorge; Castillo, Maria Magdalena Alonso; García, Karla Selene López; Rodríguez, Nora Nely Oliva (Revista Latino-Americana de Enfermagem, 2008)