@article{VUU_2009_1_a3,
     author = {V. A. Zaitsev},
     title = {Quasidifferential equation controllability},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {90--100},
     publisher = {mathdoc},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2009_1_a3/}
}