Title:A Implantação do modelo formal de ensino em Angola (Séculos XV-XX) / The establishment of the formal education in Angola (XV-XX Centuries) / La Implantación de la Educación Formal en Angola (Siglos XV-XX)
Title:Axiología y ética proposicional en el segundo Carnap: mediante análisis lógico. [Portugués] / Axiology and propositional ethics in the second Carnap: by logical analysis. [Portuguese]