@article{SM_2004_195_6_a2,
     author = {M. I. Zelikin},
     title = {Hessian of the solution of the {Hamilton{\textendash}Jacobi} equation in the theory of~extremal problems},
     journal = {Sbornik. Mathematics},
     pages = {819--831},
     year = {2004},
     volume = {195},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_6_a2/}
}