Barcelos, Valdo, and Homero Alves Schlichting. “Environmental Education, Conflicts and Responsibilities – the Contribution of Humberto Maturana’s Love Biology and Knowledge Biology”. Ambiente & Educação: Revista De Educação Ambiental, vol. 12, no. 1, Nov. 2009, pp. 59-80, https://periodicos.furg.br/ambeduc/article/view/804.