@article{700591,
title = {Projective covers in categories of topological spaces and topological algebras},
booktitle = {General Topology and Its Relations to Modern Analysis and Algebra},
series = {GDML\_Books},
publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
address = {Praha},
year = {1971},
pages = {[63]-91},
mrnumber = {MR0284388},
zbl = {0227.54005},
url = {http://dml.mathdoc.fr/item/700591}
}
Banaschewski, B. Projective covers in categories of topological spaces and topological algebras, dans General Topology and Its Relations to Modern Analysis and Algebra, GDML_Books, (1971), pp. [63]-91. http://gdmltest.u-ga.fr/item/700591/