@article{GDZPPN002062232,
title = {Fundamental Groups, ...-groups and Codimension two Submanifolds},
journal = {Commentarii mathematici Helvetici},
volume = {51},
year = {1976},
pages = {437-446},
zbl = {0362.57002},
url = {http://dml.mathdoc.fr/item/GDZPPN002062232}
}
Cappell, Sylvain E.; Shaneson, Julius L. Fundamental Groups, ...-groups and Codimension two Submanifolds. Commentarii mathematici Helvetici, Tome 51 (1976) pp. 437-446. http://gdmltest.u-ga.fr/item/GDZPPN002062232/