@article{VUU_2013_1_a4,
     author = {L. I. Rodina and A. H. Hammady},
     title = {The characteristics of attainability set connected with invariancy of control systems on the finite time interval},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {35--48},
     publisher = {mathdoc},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2013_1_a4/}
}