@article{SM_2010_201_8_a3,
     author = {V. M. Miklyukov},
     title = {Some conditions for the existence of a~total differential at a~point},
     journal = {Sbornik. Mathematics},
     pages = {1135--1152},
     publisher = {mathdoc},
     volume = {201},
     number = {8},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2010_201_8_a3/}
}