1. Inverse relations for certain Sheffer sequences;Brown;SIAM J. Math. Anal.,1981
2. Some remarks on Rota's umbral calculus;Cigler,1978
3. Fourier Series and Orthogonal Polynomials;Jackson;Caris Monograph, No. 6,1971
4. Special Functions;Rainville,1971
5. The umbral calculus;Roman;Advan. in Math.,1978