Kera, Shpetim Rexhepi, Samet, and Halil Snopce. 2019. “ON ESTIMATION OF FOURIER AND QUASI-MONOTONE-FOURIER COEFFICIENTS OF FUNCTIONS IN NIKOL’SKII CLASSES”. Matematichki Bilten 43 (1). https://doi.org/10.37560/matbil1190079r.