KRISIŪNIENĖ, A.; BATKAUSKAS, V. Accounting and Billing in GPRS Data Network. Elektronika ir Elektrotechnika, [S. l.], v. 58, n. 2, 2005. DOI: 10.5755/j02.eie.10355. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10355.. Acesso em: 11 jun. 2026.