@article{GDZPPN002062305,
title = {Knots in the 4-sphere},
journal = {Commentarii mathematici Helvetici},
volume = {51},
year = {1976},
pages = {585-596},
zbl = {0346.55004},
url = {http://dml.mathdoc.fr/item/GDZPPN002062305}
}
Gordon, C.M. Knots in the 4-sphere. Commentarii mathematici Helvetici, Tome 51 (1976) pp. 585-596. http://gdmltest.u-ga.fr/item/GDZPPN002062305/