@article{TRSPY_2019_304_a1,
     author = {E. R. Avakov and G. G. Magaril-Il'yaev},
     title = {Generalized {Needles} and {Second-Order} {Conditions} in {Optimal} {Control}},
     journal = {Informatics and Automation},
     pages = {15--31},
     publisher = {mathdoc},
     volume = {304},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2019_304_a1/}
}