@article{DE_1992_28_9_a9,
     author = {V. V. Dubrovskii and A. V. Nagornyi},
     title = {An inverse problem for a power of the {Laplace} operator with potential from $L^2$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1552--1561},
     publisher = {mathdoc},
     volume = {28},
     number = {9},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_9_a9/}
}