@article{DAN_1963_150_5_a4,
     author = {V. P. Il'in},
     title = {On inequalities between norms of partial derivatives of functions of several variables},
     journal = {Doklady Akademii Nauk},
     pages = {975--977},
     publisher = {mathdoc},
     volume = {150},
     number = {5},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_150_5_a4/}
}