@article{RM_1982_37_3_a7,
     author = {A. A. Davydov},
     title = {Singularities of the admissibility boundary in two-dimensional control systems},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {200--201},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {1982},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1982_37_3_a7/}
}