Srivastava, H. M., K. S. Nisar, and Mumtaz Ahmad Khan. 2017. “Some Umbral Calculus Presentations of the Chan-Chyan-Srivastava Polynomials and the Erkuș-Srivastava Polynomials”. Proyecciones (Antofagasta, On Line) 33 (1):77-90. https://doi.org/10.4067/S0716-09172014000100006.