@article{TM_2008_260_a17,
     author = {V. D. Stepanov and E. P. Ushakova},
     title = {On the {Geometric} {Mean} {Operator} with {Variable} {Limits} of {Integration}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {264--288},
     year = {2008},
     volume = {260},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2008_260_a17/}
}