@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/