1. Handbook of Mathematical Functions;Abramowitz,1964
2. A series representation for Euler's constant;Addison;Amer. Math. Monthly,1967
3. Special Functions;Andrews,1999
4. Sur la fonction gamma généralisée;Bendersky;Acta Math.,1933
5. Ramanujan's short unpublished manuscript on integrals and series related to Euler's constant;Berndt,2000