SINGH, Brij Pal; SINGH, Balveer. Enhanced L1-Convergence Theorems for Modified Cosine and Sine Series. Revista Review Index Journal of Multidisciplinary, [S. l.], v. 5, n. 4, p. 83–91, 2025. DOI: 10.31305/rrijm2025.v05.n04.012. Disponível em: https://www.rrijm.com/index.php/RRIJM/article/view/209.. Acesso em: 23 mar. 2026.