@article{DAN_1964_154_6_a11,
     author = {A. S. Fokht},
     title = {A boundary estimate for the solution of an equation of elliptic type of arbitrary order with variable coefficients 
},
     journal = {Doklady Akademii Nauk},
     pages = {1287--1290},
     publisher = {mathdoc},
     volume = {154},
     number = {6},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_6_a11/}
}