@article{ISU_2012_12_1_a7,
     author = {S. A. Shabrov},
     title = {On a~necessary condition of at least one quadratic functional with an integral {Stieltjes}},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {52--55},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2012_12_1_a7/}
}