OPINCĀNE, Elita. BILINGVĀLĀS MĀCĪBAS VIDES ZINĀTNĒS. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 133–135, 1999. DOI: 10.17770/etr1999vol1.1891. Disponível em: https://journals23.rta.lv/index.php/ETR/article/view/1891.. Acesso em: 21 nov. 2024.