UKVALBERGAS, A.; VOBOLIS, A. Methodology of Defining Technical Abilities for Providing ADSL Services. Elektronika ir Elektrotechnika, [S. l.], v. 54, n. 5, 2004. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/10907.. Acesso em: 8 feb. 2026.