@article{TM_2001_232_a24,
     author = {V. D. Stepanov and E. P. Ushakova},
     title = {On {Integral} {Operators} with {Variable} {Limits} of {Integration}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {298--317},
     publisher = {mathdoc},
     volume = {232},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2001_232_a24/}
}