- Author: Jane F. Hacking
- Language: English
- Year: 1998
- Author: Axel Holvoet Nicole Nau
- Language: English
- Year: 2015
- Author: Jonas Kabelka
- Language: Lithuanian
- Year: 1982
- Author: Kregždys Rolandas
- Language: Lithuanian
- Year: 2012
- Author: Иллич-Свитыч В.М.
- Language: Русский
- Year: 1963
- Author: W P Schmid
- Language: German
- Year: 1963
- Author: Jakobson R.
- Year: 1985
- Author: Werner Lehfeldt
- Language: German
- Year: 1993