- Author: Máthé Ákos, Najjaa Hanen, Neffati Mohamed
- Language: English
- Year: 2017
- Author: Máthé Ákos, Najjaa Hanen, Neffati Mohamed
- Language: English
- Year: 2017
- Author: Kuete Victor
- Language: English
- Year: 2014
- Author: Maurice M. Iwu
- Language: English
- Year: 2017