Konthoujam Sangita Devi. “Investigating Linear 2-Normed and 2-Inner Product Spaces: Orthonormal Sets and Their Applications in Analysis”. Journal of Computational Analysis and Applications (JoCAAA), vol. 32, no. 1, Feb. 2024, pp. 424-8, http://eudoxuspress.com/index.php/pub/article/view/1321.