@article{ZVMMF_1988_28_12_a13,
     author = {Kh. D. Ikramov},
     title = {Undecomposable {Hamiltonian} matrices with pure imaginary spectrum},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1897--1902},
     publisher = {mathdoc},
     volume = {28},
     number = {12},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1988_28_12_a13/}
}