Acu, A. M., H. Gonska, and M. Heilmann. “Remarks on a Bernstein-Type Operator of Aldaz, Kounchev and Render”. J. Numer. Anal. Approx. Theory, vol. 50, no. 1, Nov. 2021, pp. 3-11, doi:10.33993/jnaat501-1237.