@article{DAN_1972_202_4_a2,
     author = {I. V. Gel'man and V. G. Maz'ya},
     title = {Estimates for differential operators with constant coefficients in a halfspace},
     journal = {Doklady Akademii Nauk},
     pages = {751--754},
     publisher = {mathdoc},
     volume = {202},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_202_4_a2/}
}