1. Special Functions and Their Approximations (Vol. 1),1969
2. A Course of Modern Analysis: An Introduction to the General Theory of Infinite Series and of Analytic Functions, With an Account of the Principal Transcendental Functions;Whittaker,1902
3. A Course of Modern Analysis;Whittaker,1902
4. La fonction gamma: théorie, histoire, bibliographie;Godefroy,1901
5. Special Functions;Rainville,1960