@article{DAN_1966_170_6_a9,
     author = {Yu. G. Reshetnyak},
     title = {Generalized derivatives and differentiability almost everywhere},
     journal = {Doklady Akademii Nauk},
     pages = {1273--1275},
     publisher = {mathdoc},
     volume = {170},
     number = {6},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_6_a9/}
}