@article{IVM_2008_7_a5,
     author = {S. Ya. Serovaǐskiǐ},
     title = {Sequential differentiation and its applications in optimal control problems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {45--56},
     publisher = {mathdoc},
     number = {7},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2008_7_a5/}
}