@article{DAN_1978_239_6_a10,
     author = {A. A. Lokshin and V. E. Rok},
     title = {Fundamental solutions of wave equations with delay time},
     journal = {Doklady Akademii Nauk},
     pages = {1305--1308},
     publisher = {mathdoc},
     volume = {239},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_6_a10/}
}