KOWALENKO, V. Two methods for determining combinatorial identities. Annals of Mathematics and Physics, [S. l.], v. 6, n. 1, p. 007–011, 2023. DOI: 10.17352/amp.000069. Disponível em: https://www.peertechzpublications.us/amp/article/view/AMP-6-169. Acesso em: 10 jan. 2025.