@article{700749,
     title = {A generalization of perfect maps},
     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 = {1972},
     pages = {187-191},
     mrnumber = {MR0362192},
     zbl = {0329.18009},
     url = {http://dml.mathdoc.fr/item/700749}
}

Herrlich, H. A generalization of perfect maps, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1972), pp. 187-191. http://gdmltest.u-ga.fr/item/700749/