@article{TIMM_2015_21_2_a18,
     author = {N. N. Subbotina and L. G. Shagalova},
     title = {On the continuous extension of a generalized solution of the {Hamilton-Jacobi} equation by characteristics that form a central field of extremals},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {220--235},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2015_21_2_a18/}
}