@article{1183505530, author = {Hsiung, Chuan-Chih}, title = {An invariant of intersection of two surfaces}, journal = {Bull. Amer. Math. Soc.}, volume = {49}, number = {12}, year = {1943}, pages = { 877-880}, language = {en}, url = {http://dml.mathdoc.fr/item/1183505530} }
Hsiung, Chuan-Chih. An invariant of intersection of two surfaces. Bull. Amer. Math. Soc., Tome 49 (1943) no. 12, pp. 877-880. http://gdmltest.u-ga.fr/item/1183505530/