@article{VMUMM_1999_4_a16,
     author = {M. Z. Garaev},
     title = {On oscillating third-order differential equations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {68--70},
     year = {1999},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1999_4_a16/}
}