@article{GDZPPN00231620X, title = {Korovkin Approximation in C0(X).}, journal = {Mathematische Annalen}, volume = {237}, year = {1978}, pages = {225-238}, zbl = {0368.46028}, url = {http://dml.mathdoc.fr/item/GDZPPN00231620X} }
Donner, Klaus; Bauer, Heinz. Korovkin Approximation in C0(X).. Mathematische Annalen, Tome 237 (1978) pp. 225-238. http://gdmltest.u-ga.fr/item/GDZPPN00231620X/