@article{DAN_1974_217_4_a7,
     author = {G. I. Sechkin},
     title = {Bavrin's operator method and integral representations connected with groups and semigroups of operators},
     journal = {Doklady Akademii Nauk},
     pages = {770--773},
     publisher = {mathdoc},
     volume = {217},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_217_4_a7/}
}