@article{VUU_2005_1_a9,
     author = {E. A. Panasenko},
     title = {Density principle and stability of sets of periodic solutions for differential inclusion},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {139--154},
     publisher = {mathdoc},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2005_1_a9/}
}