GUTTILLA, Rodolfo Witzig. About the science of learning how to help oneself freely through the reciprocal action of men upon each other. Organicom, São Paulo, Brasil, v. 8, n. 14, p. 159–166, 2011. DOI: 10.11606/issn.2238-2593.organicom.2011.139091. Disponível em: https://www.revistas.usp.br/organicom/article/view/139091.. Acesso em: 22 may. 2024.