@article{IVM_1977_9_a7,
     author = {S. G. Mikhlin and V. D. Sapozhnikov},
     title = {Potentials of the wave equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {48--64},
     year = {1977},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1977_9_a7/}
}