@article{MAT_1961_5_1_a4,
     author = {T. Kato},
     title = {Growth properties of solutions of the reduced wave equation with a variable coefficient},
     journal = {Matematika},
     pages = {115--135},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1961_5_1_a4/}
}