@article{FPM_2014_19_4_a0,
     author = {E. R. Avakov and G. G. Magaril-Il'yaev},
     title = {Mix of controls and the {Pontryagin} maximum principle},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {5--20},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2014_19_4_a0/}
}