@article{DAN_1967_174_3_a15, author = {V. K. Egerev}, title = {Operational method of determining certain integral characteristics}, journal = {Doklady Akademii Nauk}, pages = {564--565}, year = {1967}, volume = {174}, number = {3}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_174_3_a15/} }