JANA, R. K.; RAPELI, S. J.; SHUKLA, A. K. Generalized Sheffer’s Classification and Their q-Analague. The Journal of the Indian Mathematical Society, [S. l.], v. 84, n. 3-4, p. 201–210, 2017. DOI: 10.18311/jims/2017/14851. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/14851. Acesso em: 30 apr. 2024.