@article{1183503577,
author = {Feld, J. M.},
title = {Differential and integral invariants of plane curves and horn angles},
journal = {Bull. Amer. Math. Soc.},
volume = {47},
number = {11},
year = {1941},
pages = { 318-327},
language = {en},
url = {http://dml.mathdoc.fr/item/1183503577}
}
Feld, J. M. Differential and integral invariants of plane curves and horn angles. Bull. Amer. Math. Soc., Tome 47 (1941) no. 11, pp. 318-327. http://gdmltest.u-ga.fr/item/1183503577/