Anastácio, Zélia, y Susana Marinho. 2014. «Results of a Sex Education Program for 2nd and 3rd Cycle of Portuguese Basic Education Students». Revista INFAD De Psicología. International Journal of Developmental and Educational Psychology. 3 (1):423-30. https://doi.org/10.17060/ijodaep.2014.n1.v3.520.