@article{ZNSL_1987_163_a6,
     author = {L. V. Kapitanski},
     title = {The {Cauchy} problem for a semilinear wave {equation.~I}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {76--104},
     publisher = {mathdoc},
     volume = {163},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_163_a6/}
}