@article{DAN_1963_153_1_a0,
     author = {D. L. Berman},
     title = {On the theory of semigroups of linear operators},
     journal = {Doklady Akademii Nauk},
     pages = {9--11},
     publisher = {mathdoc},
     volume = {153},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_1_a0/}
}