@article{JSFU_2012_5_3_a9,
     author = {Kirill A. Kirillov},
     title = {Estimates for the norm of the error functional in $H_\alpha$ for cubature formulas which exact for {Haar} polynomials in the two-dimensional case},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {382--387},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2012_5_3_a9/}
}