@article{TRSPY_2021_315_a15,
     author = {M. I. Ronzhina and L. A. Manita and L. V. Lokutsievskiy},
     title = {Neighborhood of the {Second-Order} {Singular} {Regime} in {Problems} with {Control} in a {Disk}},
     journal = {Informatics and Automation},
     pages = {222--236},
     publisher = {mathdoc},
     volume = {315},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2021_315_a15/}
}