1. Agratini, O.: On the iterates of a class of summation type linear positive operators. Comput. Math. Appl. 55, 1178–1180 (2008)
2. Agratini, O., Rus, I.A.: Iterates of a class of discrete linear operators via contraction principle. Comm. Math. Univ. Caroline 44, 555–563 (2003)
3. Altomare, F.: Limit semigroups of BernsteinSchnabl operators associated with positive projections, Ann. Sc. Norm. Super. Pisa, Cl. Sci., IV. Ser. 16(2), 259–279 (1989)
4. Altomare, F.: Positive projections, approximation processes and degenerate diffusion equations. Conf. Semin. Mat. Univ. Bari 241, 43–68 (1991)
5. Altomare, F.: On some convergence criteria for nets of positive operators on continuous function spaces. J. Math. Anal. Appl. 398, 542–552 (2013)