JURKSAITIENE, Nijole; MARKEVICIENE, Laima; MISIUNAS, Donatas. The Research on Environment Protection Knowledge and Competencies in Non-Formal Education. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 235–239, 2015. DOI: 10.17770/etr2013vol1.808. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/808.. Acesso em: 2 may. 2024.