@article{SM_1969_7_3_a6,
     author = {V. V. Napalkov},
     title = {On the continuability of the operator of generalized differentiation},
     journal = {Sbornik. Mathematics},
     pages = {389--398},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1969_7_3_a6/}
}