@article{bwmeta1.element.bwnjournal-article-fmv36i1p14,
author = {Karl Menger},
title = {What paths have length?},
journal = {Fundamenta Mathematicae},
volume = {36},
year = {1949},
pages = {109-118},
zbl = {0038.35002},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv36i1p14}
}
Menger, Karl. What paths have length?. Fundamenta Mathematicae, Tome 36 (1949) pp. 109-118. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv36i1p14/