GAIDYS, Antanas. Impressions from a Visit to the US Universities. Problemos, [S. l.], v. 21, p. 99–101, 1978. DOI: 10.15388/Problemos.1978.21.6218. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/6218. Acesso em: 28 oct. 2025.