@article{IVM_1977_3_a10,
     author = {L. P. Kagadii},
     title = {The moduli of smoothness and the {Fourier} coefficients of functions of two variables},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {101--103},
     publisher = {mathdoc},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1977_3_a10/}
}