@article{ZNSL_2008_359_a5,
     author = {Kh. D. Ikramov and H. Fassbender},
     title = {On the product of two {skew-Hamiltonian} matrices or two skew-symmetric matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {45--51},
     year = {2008},
     volume = {359},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2008_359_a5/}
}