@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/