@article{TM_1972_128_a10,
     author = {P. I. Lizorkin},
     title = {Generalized {H\"older} classes of functions in connection with fractional differentiation},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {172--177},
     publisher = {mathdoc},
     volume = {128},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1972_128_a10/}
}