Source:
History: A Collection of Lithuanian Universities' Research Papers / Istorija: Lietuvos Aukštųjų Mokyklų Mokslo Darbai; 2020, Vol. 117 Issue 1, p47-66, 20p
Source:
Proceedings of the International Scientific Conference of Daugavpils University / Daugavpils Universitates Starptautiskas Zinatniskas Konferences Materiali; 2014, Issue 55, p997-1001, 5p