@article{GDZPPN002328070,
title = {Korovkin Approximation in Waelbroeck Algebras.},
journal = {Mathematische Annalen},
volume = {275},
year = {1986},
pages = {423-438},
zbl = {0576.41014},
url = {http://dml.mathdoc.fr/item/GDZPPN002328070}
}
Pannenberg, Michael. Korovkin Approximation in Waelbroeck Algebras.. Mathematische Annalen, Tome 275 (1986) pp. 423-438. http://gdmltest.u-ga.fr/item/GDZPPN002328070/