@article{TMF_1973_15_2_a5,
     author = {D. A. Kirzhnits and G. Yu. Kryuchkov},
     title = {On the photon {Green's} function},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {227--236},
     year = {1973},
     volume = {15},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1973_15_2_a5/}
}