@article{1178244837,
author = {Sasaki, Shigeo},
title = {The minimum number of points of inflexion of closed curves in the projective plane},
journal = {Tohoku Math. J. (2)},
volume = {9},
number = {3},
year = {1957},
pages = { 113-117},
language = {en},
url = {http://dml.mathdoc.fr/item/1178244837}
}
Sasaki, Shigeo. The minimum number of points of inflexion of closed curves in the projective plane. Tohoku Math. J. (2), Tome 9 (1957) no. 3, pp. 113-117. http://gdmltest.u-ga.fr/item/1178244837/