SINGH, Uaday, and Arti RATHORE. “A Note on the Degree of Approximation of Functions Belonging to Certain Lipschitz Class by Almost Riesz Means”. Studia Universitatis Babeș-Bolyai Mathematica, vol. 63, no. 3, Sept. 2018, pp. 371–379, doi:10.24193/subbmath.2018.3.08.