@article{VSGU_2013_9_a5,
     author = {M. G. Yumagulov and D. A. Yakshibaeva},
     title = {Operator method for the study of small oscillations in systems with aftereffect},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {37--42},
     publisher = {mathdoc},
     number = {9},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2013_9_a5/}
}