HAHELE, Rudite. Creating and Implementation Elective Courses at Higher Education Institution - Experience Analysis. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 1, p. 158–165, 2015. DOI: 10.17770/sie2015vol1.287. Disponível em: https://journals.ru.lv/index.php/SIE/article/view/287.. Acesso em: 8 apr. 2025.