On a Pair of Operator Series Expansions Implying a Variety of Summation Formulas. Analysis in Theory and Applications, [S. l.], v. 31, n. 3, p. 260–282, 2017. DOI: 10.4208/ata.2015.v31.n3.5. Disponível em: https://global-sci.com/index.php/ata/article/view/8063. Acesso em: 6 dec. 2025.