@article{ISU_2015_15_3_a1,
     author = {S. S. Volosivets and T. V. Likhacheva},
     title = {Several questions of approximation by polynomials with respect to multiplicative systems in weighted $L^p$ spaces},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {251--258},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2015_15_3_a1/}
}