@article{700840,
     title = {Projective covers in certain categories of topological spaces},
     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 = {1967},
     pages = {52-55},
     zbl = {0172.24402},
     url = {http://dml.mathdoc.fr/item/700840}
}

Banaschewski, B. Projective covers in certain categories of topological spaces, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1967), pp. 52-55. http://gdmltest.u-ga.fr/item/700840/