[1] R. Bojanic, F. Cheng:
Estimates for the rate of approximation of functions of bounded variation by Hermite-Fejer polynomials. Proceedings of the Conference of Canadian Math. Soc. 3 (1983), 5–17.
MR 0729319
[2] R. Bojanic, M. K. Khan: Summability of Hermite-Fejer interpolation for functions of bounded variation. J. Nat. Sci. Math. 32 (1992), 5–10.
[3] I. Chlodovsky:
Sur la representation des fonctions discontinuous par les polynômes de M. S. Bernstein. Fund. Math. 13 (1929), 62–72.
DOI 10.4064/fm-13-1-62-72
[6] O. Duman, M. K. Khan, C. Orhan:
$A$-statistical convergence of approximating operators. Math. Inequal. Appl. 4 (2003), 689–699.
MR 2013529
[14] P. P. Korovkin:
Linear Operators and Theory of Approximation. Hindustan Publ. Comp., Delhi, 1960.
MR 0150565
[15] P. Kostyrko, T. Šalát, W. Wilczyński:
${I}$-convergence. Real Anal. Exchange 26 (2000/01), 669–685.
MR 1844385
[16] C. Kuratowski: Topologie I. PWN, Warszawa, 1958.
[18] I. Niven, H. S. Zuckerman, H. Montgomery:
An Introduction to the Theory of Numbers. 5th Edition. Wiley, New York, 1991.
MR 1083765
[19] H. L. Royden:
Real Analysis. 2nd edition. Macmillan Publ., New York, 1968.
MR 1013117