
- Author: World World Bank
- Language: English
- Year: 2020

- Author: World World Bank
- Language: English
- Year: 2018

- Author: Ariel Fiszbein, Ariel Fiszbein, Francisco H. G Ferreira
- Language: English
- Year: 2009

- Author: Ghazala Mansuri Vijayendra Rao
- Language: English
- Year: 2012