@article{GDZPPN002291436, title = {Theorie der Netze.}, journal = {Mathematische Annalen}, volume = {152}, year = {1963}, pages = {361-418}, zbl = {0112.27603}, url = {http://dml.mathdoc.fr/item/GDZPPN002291436} }
BERGMANN, G. Theorie der Netze.. Mathematische Annalen, Tome 152 (1963) pp. 361-418. http://gdmltest.u-ga.fr/item/GDZPPN002291436/