@article{GDZPPN002215322,
title = {Graphens\"atze f\"ur topologische R\"aume.},
journal = {Manuscripta mathematica},
volume = {1},
year = {1969},
pages = {111-124},
zbl = {0167.51204},
url = {http://dml.mathdoc.fr/item/GDZPPN002215322}
}
Niessen, Heinz-Dieter. Graphensätze für topologische Räume.. Manuscripta mathematica, Tome 1 (1969) pp. 111-124. http://gdmltest.u-ga.fr/item/GDZPPN002215322/