- Author: Jerald G. Graeme
- Language: English
- Year: 1973
- Author: McWorther Malcolm Myers, Pettit Joseph Mayo
- Language: English
- Year: 1961
- Author: Jung Walter G.
- Language: English
- Year: 2005
- Author: Házman István
- Language: Hungarian
- Year: 1979
- Author: Ndjountche Tertulien
- Language: English
- Year: 2019
- Author: Ndjountche Tertulien
- Language: English
- Year: 2019
- Author: Allen L. Hollister
- Language: English
- Year: 2007
- Author: Polonnikov Dmitriĭ Evstigneevich
- Language: English
- Year: 2014