DROTVINAS, L. An examination of verbal adverbs teaching Lithuanians the Russian language. Psichologija, [S. l.], v. 6, p. 43–52, 1964. DOI: 10.15388/Psichol.1964.6.8899. Disponível em: https://www.zurnalai.vu.lt/psichologija/article/view/8899. Acesso em: 5 nov. 2025.