@article{FPM_1996_2_2_a3,
     author = {L. A. Manita},
     title = {The behaviour of extremals in the neighbourhood of singular regimes and non-smooth {Liapunov} functions in optimal control problems},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {411--447},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1996_2_2_a3/}
}