@article{DAN_1957_116_2_a0,
     author = {M. B. Kapilevich},
     title = {On the problem of analytic continuation of the fundamental solutions of an hyperbolic type of equation with singular coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {167--170},
     publisher = {mathdoc},
     volume = {116},
     number = {2},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_116_2_a0/}
}