@article{GDZPPN002536048,
title = {Approximation properties of a sequence of linear positive operators.},
journal = {Publications de l'Institut Math\'ematique [Elektronische Ressource]},
volume = {33},
year = {1975},
pages = {89-100},
zbl = {0349.41009},
url = {http://dml.mathdoc.fr/item/GDZPPN002536048}
}
Lupas, A.; Lazarevic, I. Approximation properties of a sequence of linear positive operators.. Publications de l'Institut Mathématique [Elektronische Ressource], Tome 33 (1975) pp. 89-100. http://gdmltest.u-ga.fr/item/GDZPPN002536048/