@article{IVM_1993_5_a11,
     author = {A. G. Rodionova and E. L. Tonkov},
     title = {On the continuity of the time-optimality function of a~linear system in the critical case},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {101--111},
     publisher = {mathdoc},
     number = {5},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1993_5_a11/}
}