1. The Umbral Calculus;Roman,1984
2. Bernoulli numbers and polynomials from a more general point of view;Dattoli;Rendiconti Matematica,2002
3. Operational Methods, Harmonic Numbers and Riemann Function;Dattoli,2008
4. Concrete Mathematics: A Foundation for Computer Science;Graham,1994
5. A note on harmonic numbers, umbral calculus and generating functions