@article{ISU_2009_9_1_a8,
     author = {I. I. Sharapudinov and G. N. Muratova},
     title = {Same properties $r$-fold integration series on {Fourier--Haar} system},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {68--76},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2009_9_1_a8/}
}