- Author: Kenneth H. Rosen
- Language: English
- Year: 2004
- Author: Ian Stewart David Tall
- Language: English
- Year: 2002
- Author: Thomas Koshy
- Language: English
- Year: 2008
- Author: Leonard Eug Dickson
- Language: English
- Year: 1929
- Author: Серпинский В
- Language: Русский
- Year: 1968
- Author: Ленг С. (Lang S.)
- Language: Русский
- Year: 1966
The Pell Equation
djvu
- Author: Edward Everett Whitford
- Language: English
- Year: 2009
- Author: Граве Д.А.
- Language: Русский
- Author: Salkind C.
- Language: English
- Year: 1961