@article{DAN_1970_192_3_a7,
     author = {T. G. Pletneva and S. D. \`Eidel'man},
     title = {Three cylinder theorems for the solutions of quasielliptic linear evolution equations},
     journal = {Doklady Akademii Nauk},
     pages = {507--510},
     publisher = {mathdoc},
     volume = {192},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_192_3_a7/}
}