@article{700635,
     title = {Categorial aspects are useful in topology},
     booktitle = {General topology and its relations to modern analysis and algebra IV},
     series = {GDML\_Books},
     publisher = {Society of Czechoslovak Mathematicians and Physicist},
     address = {Praha},
     year = {1977},
     pages = {170-172},
     mrnumber = {MR0454926},
     zbl = {0365.54012},
     url = {http://dml.mathdoc.fr/item/700635}
}

Hušek, M. Categorial aspects are useful in topology, dans General topology and its relations to modern analysis and algebra IV, GDML_Books,  (1977), pp. 170-172. http://gdmltest.u-ga.fr/item/700635/