lowered and became other vowels. Ivšić定律 Accented weak yers (according to Havlík'slaw) lost their accent to the preceding syllable, which received a "neoacute"
fricative)及響音,以致於/s z n l r/音可與/sʲ zʲ nʲ lʲ rʲ/音對立,雖然可能的對立皆限于特定環境。 其他方面,顎音化輔音則在前元音前出現同位異音。 當以哈夫利克定律(英语:Havlík'slaw)來判斷/ъ/或/ь/的强弱音規則時,而顎音化起初是由仍留存的高元音所引發出來,
Routledge. 2019 [2021-01-03]. ISBN 9780429590061. (原始内容存档于2020-01-12). Jan Havlíček, Vít Třebický, Jaroslava Varella Valentova, Karel Kleisner, Robert Mbe Akoko