KUZMICKAITĖ , E. The main types of information units conveyed by the present perfect, past indefinite and past perfect and how to teach them. Psichologija, [S. l.], v. 11, p. 127–138, 1971. DOI: 10.15388/Psichol.1971.11.9258. Disponível em: https://test.zurnalai.vu.lt/psichologija/article/view/9258. Acesso em: 26 oct. 2025.