@article{FAA_1976_10_2_a19,
     author = {V. L. Roitburd},
     title = {Representation of the operator $e^{-tP}$ by a continual integral},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {86--87},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1976_10_2_a19/}
}