- Author: John Chryssavgis, Barsanuphius and Barsanuphius and John, John Chryssavgis
- Language: English
- Year: 2006
- Author: Archpriest Anthony B. Gavalas
- Language: English
- Year: 1996
- Author: Hugh Vere Redman
- Language: English
- Year: 2010
- Author: Olusoji Adeyi, Thomas Novotny, Enis Baris, Sarbani Chakraborty, Ross Pavis
- Language: English
- Year: 2003
- Author: Dena Ringold, The World Bank
- Language: English
- Year: 2000
- Author: Vesselin Popovski, Mónica Serrano
- Language: English
- Year: 2012
- Author: June Levitt Nislick, June Levitt Nislick
- Language: English
- Year: 2005
- Author: Jolanta Aldukaite
- Language: English
- Year: 2009
