Suresh Kumar Sahani, Amarnath Kumar Thakur, Anjali Dubey. “Degree of Approximation of Conjugate of a Function Belonging to (N,p,q) Class by Matrix Summability Means of Conjugate Fourier Series”. Mathematical Statistician and Engineering Applications, vol. 71, no. 4, Aug. 2022, pp. 321-3, doi:10.17762/msea.v71i4.510.