@article{KUKZ_1987_23_23_a9,
     author = {N. B. Il'inskii},
     title = {On inverse boundary value problems},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {89--93},
     publisher = {mathdoc},
     volume = {23},
     number = {23},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1987_23_23_a9/}
}