KOVALOVA, Z. F. VIRTUAL SERVICE OF UNIVERSITY LIBRARY – NEW FORM OF REFERENCE SERVIVE. University Library at a New Stage of Social Communications Development. Conference Proceedings, [S. l.], v. 1, n. 2, p. 58–61, 2019. DOI: 10.15802/unilib/2013_175203. Disponível em: https://unilibnsd.ust.edu.ua/article/view/175203. Acesso em: 22 dec. 2024.