@article{ZVMMF_2012_52_11_a3,
     author = {V. A. Abilov and M. K. Kerimov},
     title = {Sharp estimates for the convergence rate of {\textquotedblleft}hyperbolic{\textquotedblright} partial sums of double fourier series in orthogonal polynomials},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1952--1958},
     publisher = {mathdoc},
     volume = {52},
     number = {11},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2012_52_11_a3/}
}