@article{1029001155,
author = {Reilly, Robert C.},
title = {On the Hessian of a function and the curvatures of its graph.},
journal = {Michigan Math. J.},
volume = {20},
number = {4},
year = {1974},
pages = { 373-383},
language = {en},
url = {http://dml.mathdoc.fr/item/1029001155}
}
Reilly, Robert C. On the Hessian of a function and the curvatures of its graph.. Michigan Math. J., Tome 20 (1974) no. 4, pp. 373-383. http://gdmltest.u-ga.fr/item/1029001155/