@article{ZVMMF_2002_42_11_a1,
     author = {Kh. D. Ikramov},
     title = {Reduction to the principal axes by means of pseudo-unitary and symplectic transformations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1624--1626},
     year = {2002},
     volume = {42},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2002_42_11_a1/}
}