@article{VUU_2008_2_a20,
     author = {E. A. Kolpakova},
     title = {On description of optimal open-loop controls via the method of characteristics},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {59--60},
     publisher = {mathdoc},
     number = {2},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2008_2_a20/}
}