@article{DAN_1957_112_2_a3,
     author = {M. M. Lavrent'ev},
     title = {On {Cauchy} problem for linear elliptical equations of the second order},
     journal = {Doklady Akademii Nauk},
     pages = {195--197},
     publisher = {mathdoc},
     volume = {112},
     number = {2},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_112_2_a3/}
}