@article{ZVMMF_1986_26_4_a5,
     author = {A. A. Belolipetskii and A. Yu. Ryabov},
     title = {Asymptotic estimates for solutions of the time-optimality problem near breakaway points of an isochronous surface},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {521--535},
     publisher = {mathdoc},
     volume = {26},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1986_26_4_a5/}
}