@article{TM_1987_180_a80,
     author = {V. G. Krotov},
     title = {On differentiability properties of functions in $H^p$ on the boundary of the disk of convergence},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {141--142},
     year = {1987},
     volume = {180},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a80/}
}