@article{DAN_1989_309_3_a6,
     author = {O. G. Smolyanov and E. T. Shavgulidze},
     title = {Representation of the solutions of second-order linear evolution},
     journal = {Doklady Akademii Nauk},
     pages = {545--550},
     publisher = {mathdoc},
     volume = {309},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_3_a6/}
}