@article{RM_1964_19_4_a6,
     author = {{\CYRYU}. L. Bessonov},
     title = {On the existence of mixed derivatives of fractional order in $L_p$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_4_a6/}
}