- Author: World Bank
- Language: English
- Year: 2007
- Author: Damien de Walque
- Language: English
- Year: 2013
- Author: Glassman Amanda, Temin Miriam
- Language: English
- Year: 2016
- Author: Glassman Amanda, Temin Miriam
- Language: English
- Year: 2016
- Author: Skolnik Richard L.
- Language: English
- Year: 2017
- Author: Sheila Chander Vir
- Language: English
- Year: 2012