@article{TSP_2014_30_30_a13,
     author = {M. V. Smolentsev},
     title = {The existence of a linear third-order equation with a countable frequency spectrum},
     journal = {Trudy Seminara im. I.G. Petrovskogo},
     pages = {242--251},
     year = {2014},
     volume = {30},
     number = {30},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TSP_2014_30_30_a13/}
}