SHRIVASTAVA, U.K. and VERMA, S.K. 1995. ON THE DEGREE OF APPROXIMATION OF FUNCTIONS BELONGING TO THE LIPSCHITZ CLASS BY $(e,c)$ MEANS. Tamkang Journal of Mathematics. 26, 3 (Sep. 1995), 225–229. DOI:https://doi.org/10.5556/j.tkjm.26.1995.4399.