1. Sur un théorème de M.S. Bernstein relatif á la transformation de Laplace–Stieltjes;Dubourdieu;Compos. Math.,1939
2. The Laplace Transform;Widder,1941
3. Some classes of completely monotonic functions;Alzer;Ann. Acad. Sci. Fenn.,2002
4. Handbook of Mathematical Functions with Formulas and Mathematical Tables,1965
5. Some gamma function inequalities;Alzer;Math. Comp.,1993