@article{700716,
title = {On descriptive classification of functions},
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 = {235-242},
mrnumber = {MR0355956},
zbl = {0309.54015},
url = {http://dml.mathdoc.fr/item/700716}
}
Katětov, M. On descriptive classification of functions, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books, (1972), pp. 235-242. http://gdmltest.u-ga.fr/item/700716/