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@article{MS_1945__59_3_a0, author = {{\CYRI}.{\CYRG}. {\CYRP}{\cyre}{\cyrt}{\cyrr}{\cyro}{\cyrv}{\cyrs}{\cyrk}{\cyri}{\cyrishrt}}, title = {On the diffusion of waves and the lacunas for hyperbolic equations}, journal = {Matemati\v{c}eskij sbornik}, pages = {289--370}, publisher = {mathdoc}, volume = {59}, number = {3}, year = {1945}, zbl = {0061.21309}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MS_1945__59_3_a0/} }
И.Г. Петровский. On the diffusion of waves and the lacunas for hyperbolic equations. Matematičeskij sbornik, Tome 59 (1945) no. 3, pp. 289-370. http://geodesic.mathdoc.fr/item/MS_1945__59_3_a0/