@article{ISU_2016_16_4_a0,
     author = {N. Yu. Agafonova},
     title = {On the $L^1$-convergence of series in multiplicative systems},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {371--377},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2016_16_4_a0/}
}