KRISHNAMACHARI, C. The Operator (x, L)ⁿ. The Journal of the Indian Mathematical Society, [S. l.], v. 15, p. 3–4, 1924. DOI: 10.18311/jims/1924/17655. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/17655. Acesso em: 5 may. 2024.