@article{GDZPPN002338335, title = {Augmented group systems and n-knots.}, journal = {Mathematische Annalen}, volume = {295}, year = {1993}, pages = {585-594}, zbl = {0793.57012}, url = {http://dml.mathdoc.fr/item/GDZPPN002338335} }
Silver, Daniel S. Augmented group systems and n-knots.. Mathematische Annalen, Tome 295 (1993) pp. 585-594. http://gdmltest.u-ga.fr/item/GDZPPN002338335/