- Author: Kuryłowicz Jerzy.
- Language: English
- Author: Gamkrelidze Th. V. Ivanov V.V.
- Language: English
- Author: Э. Г. Туманян
- Language: Русский
- Year: 1978
- Author: Э. А. Макаев
- Language: Русский
- Year: 1970
- Author: А. С. Николаев
- Language: Русский
- Year: 2010
- Author: Герценберг Л.Г.
- Language: Русский
- Year: 1972
- Author: Andrew Miles Byrd
- Language: English
- Year: 2015
- Author: Топоров В.Н.
- Language: Русский
- Year: 2006