@article{INTO_2021_193_a9,
     author = {V. I. Kachalov},
     title = {Smoothness in the viscosity of solutions of nonlinear differential equations in a {Banach} space},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {99--103},
     publisher = {mathdoc},
     volume = {193},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2021_193_a9/}
}