@article{VUU_2010_1_a1,
     author = {E. O. Burlakov and E. S. Zhukovskii},
     title = {On a correctness of   boundary value problems and continuous dependence of periodic solutions of controllable systems on parameters},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {11--21},
     publisher = {mathdoc},
     number = {1},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2010_1_a1/}
}