References
- Bauer, Gero - Dieter Kastovsky (eds.) 1988 Luick revisited. Tübingen: Gunter Narr
- Brunner, Karl 1963 An outline of Middle English grammar. (Translated by G. K. W. Johnston.) Oxford: Blackwell.
- Chadwyck-Healey 1992 English poetry full-text database. Cambridge: Chadwyck-Healey Ltd.
- Jones, Charles 1989 A history of English phonology. London: Longman.
- Jordan, Richard [1925] 1974 Handbook of Middle English grammar: Phonology. (Translated and revised by E. J. Crook.) The Hague: Mouton.
- Luick, Karl 1940 Historische Grammatik der englischen Sprache. Leipzig: Tauchnitz.
- Lutz, Angelika 2004 "The first push: A prelude to the Great Vowel Shift", Anglia 122: 209-224.
- Wełna, Jerzy 1988 "Historische Grammatik and the Middle English diphthongal systems", in: Bauer, Giro - Dieter Kastovsky (eds.), 419-433.
- Wełna, Jerzy 2004 "Middle English ē-raising: A prelude to the Great Vowel Shift", Studia Anglica Posnaniensia 40: 75-83.