@article{GDZPPN002327465,
title = {Tangles, Property P, and a Problem of J. Martin.},
journal = {Mathematische Annalen},
volume = {270},
year = {1985},
pages = {215-226},
url = {http://dml.mathdoc.fr/item/GDZPPN002327465}
}
Scharlemann, Martin; Bleiler, Steven. Tangles, Property P, and a Problem of J. Martin.. Mathematische Annalen, Tome 270 (1985) pp. 215-226. http://gdmltest.u-ga.fr/item/GDZPPN002327465/