VACCA DICKSON, Gustavo. DEFINIENDO LAS VARIABLES. Odontología Sanmarquina, [S. l.], v. 1, n. 4, p. 61–62, 1999. DOI: 10.15381/os.v1i4.3620. Disponível em: https://revistasinvestigacion.unmsm.edu.pe/index.php/odont/article/view/3620.. Acesso em: 17 sep. 2024.