1. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical tables,1972
2. Inequalities for the gamma function relating to asymptotic expansions;Allasia;Math. Inequal. Appl.,2002
3. Inequalities for the gamma and polygamma functions;Alzer;Abh. Math. Sem. Univ. Hamburg,1998
4. Inequalities for zero-balanced hypergeometric functions;Anderson;Trans. Am. Math. Soc.,1995
5. Sur la serie harmonique;Cesàro;Nouvelles Annales de Mathématiques,1885