@article{GDZPPN002058995, title = {Some Remarks concerning Surfaces in Three-space.}, journal = {Commentarii mathematici Helvetici}, volume = {42}, year = {1967}, pages = {307-313}, zbl = {0162.53002}, url = {http://dml.mathdoc.fr/item/GDZPPN002058995} }
Hawley, Newton S. Some Remarks concerning Surfaces in Three-space.. Commentarii mathematici Helvetici, Tome 42 (1967) pp. 307-313. http://gdmltest.u-ga.fr/item/GDZPPN002058995/