@article{DE_1987_23_11_a13,
     author = {A. I. Markovskii},
     title = {On $L_p$-estimates for the {Klein{\textendash}Gordon} equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1956--1963},
     year = {1987},
     volume = {23},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_11_a13/}
}