@article{VMUMM_2014_6_a4,
     author = {M. K. Potapov and B. V. Simonov},
     title = {Properties of the mixed modulus of smoothness of positive order in a mixed metric},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {31--40},
     publisher = {mathdoc},
     number = {6},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2014_6_a4/}
}