@article{MZM_1987_42_5_a7,
     author = {N. V. Krylov and G. V. Nosovskii and M. V. Safonov},
     title = {Degeneracy domain of a nonlinearity in the {Hamilton{\textendash}Jacobi{\textendash}Bellman} equation with constant coefficients},
     journal = {Matemati\v{c}eskie zametki},
     pages = {685--690},
     year = {1987},
     volume = {42},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_5_a7/}
}