@article{GDZPPN002429578,
title = {All Knot Groups Are Metric.},
journal = {Mathematische Zeitschrift},
volume = {185},
year = {1984},
pages = {269-272},
zbl = {0536.57002},
url = {http://dml.mathdoc.fr/item/GDZPPN002429578}
}
Clark, Bradd E.; Schneider, Victor P. All Knot Groups Are Metric.. Mathematische Zeitschrift, Tome 185 (1984) pp. 269-272. http://gdmltest.u-ga.fr/item/GDZPPN002429578/