@article{ZNSL_1994_215_a0,
     author = {M. I. Belishev and A. P. Kachalov},
     title = {Operator integral in multidimensional spectral {Inverse} {Problem}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {9--37},
     publisher = {mathdoc},
     volume = {215},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_215_a0/}
}