AHRENS, Andreas; ZASCERINSKA, Jelena. Principles of Sampling in Educational Research in Higher Education. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 1, p. 25–35, 2015. DOI: 10.17770/sie2015vol1.310. Disponível em: https://journals.rta.lv/index.php/SIE/article/view/310.. Acesso em: 30 may. 2024.