@article{TSP_2014_30_30_a14,
     author = {A. Kh. Stash},
     title = {Spectra of total and vector frequencies of third-order linear differential equations},
     journal = {Trudy Seminara im. I.G. Petrovskogo},
     pages = {252--269},
     year = {2014},
     volume = {30},
     number = {30},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TSP_2014_30_30_a14/}
}