STEPONAVIČIUS, A. Wełna, Jerzy. A critical survey of a historical phonology of English vowels (with special reference to Karl Luick’s “Historische Grammatik der englischen Sprache”). Warszawa: Wydawnictwo Uniwersytetu Warszawskiego, 1987. Kalbotyra, [S. l.], v. 40, n. 3, p. 130–134, 1989. Disponível em: https://www.zurnalai.vu.lt/kalbotyra/article/view/23459. Acesso em: 1 may. 2025.