@article{TMF_1989_79_1_a13,
     author = {I. G. Fikhtengol'ts},
     title = {Elements of~the theory of~gravitational waves},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {146--150},
     publisher = {mathdoc},
     volume = {79},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1989_79_1_a13/}
}