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- Language: English
- Year: 2015

- Author: IBM Redbooks
- Language: English
- Year: 2004

- Author: Sanjeev Gupta, George T. Abed, Sanjeev Gupta
- Language: English
- Year: 1992

- Author: Heinz-Dietrich Fischer, Erika J. Fischer
- Language: English
- Year: 1989

- Author: Peterkins Manyong
- Language: English
- Year: 2008

- Author: Tina Søreide, World Bank
- Language: English
- Year: 2014

- Author: Marco Pani
- Language: English
- Year: 2009