@article{1077493520,
author = {Chang, Su-Cheng},
title = {The point of inflexion of a plane curve},
journal = {Duke Math. J.},
volume = {9},
number = {1},
year = {1942},
pages = { 823-832},
language = {en},
url = {http://dml.mathdoc.fr/item/1077493520}
}
Chang, Su-Cheng. The point of inflexion of a plane curve. Duke Math. J., Tome 9 (1942) no. 1, pp. 823-832. http://gdmltest.u-ga.fr/item/1077493520/