@article{CMH_1971__46_139494,
     author = {Sylvain E. Cappell and Julius L. Shaneson},
     title = {On {Four} {Dimensional} {Surgery} and {Applications}},
     journal = {Commentarii mathematici Helvetici},
     pages = {500--528},
     publisher = {mathdoc},
     volume = {46},
     year = {1971},
     zbl = {0233.57015},
     url = {http://geodesic.mathdoc.fr/item/CMH_1971__46_139494/}
}