Mohapatra, R. N., and B. N. Sahney. “Approximation of Continuous Functions by Their Fourier Series”. Anal. Numér. Théor. Approx. 10, no. 1 (February 1, 1981): 81–87. Accessed April 11, 2025. https://ictp.acad.ro/jnaat/journal/article/view/1981-vol10-no1-art9.