- Author: Elisa Morgera
- Language: English
- Year: 2012
- Author: Union européenne., Razzaque Jona
- Language: English
- Year: 2013
- Author: Bollier David, Weston Burns H
- Language: English
- Year: 2014
- Author: Agius Emmanuel
- Language: English
- Year: 2013
- Author: Dorsey Kurkpatrick
- Language: English
- Year: 2014
- Author: La Follette Cameron, Maser Chris
- Language: English
- Year: 2017
- Author: La Follette Cameron, Maser Chris
- Language: English
- Year: 2017
- Author: La Follette Cameron, Maser Chris
- Language: English
- Year: 2017
- Author: Yūsuf Būghālim
- Language: Arabic
- Year: 2015
- Author: Silke Marie Christiansen (auth.)
- Language: English
- Year: 2016