@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/