@article{FPM_1997_3_1_a8,
     author = {J. Cruz and R. Martinez and R. Navarro},
     title = {Wigner--von~Neumann quasi-isospectral manifolds},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {151--152},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1997_3_1_a8/}
}