PAVLĀNS, Vitālijs; PURVIŅŠ, Eduards; EŽMALE, Sandra. ELECTRONIC INVOICING. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, Rezekne, Latvia, n. 20, p. 162–167, 2016. DOI: 10.17770/het2016.20.3534. Disponível em: https://journals.ru.lv/index.php/HET/article/view/3534.. Acesso em: 22 dec. 2024.