@article{DAN_1974_215_4_a7,
     author = {\`E. M. Saak},
     title = {An a priori estimate in $L_p$ for a problem with oblique derivative},
     journal = {Doklady Akademii Nauk},
     pages = {796--799},
     publisher = {mathdoc},
     volume = {215},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_215_4_a7/}
}