@article{ETNA_2006__23__a10,
     author = {Watkins,  David S.},
     title = {On the reduction of a {Hamiltonian} matrix to {Hamiltonian} {Schur} form},
     journal = {Electronic transactions on numerical analysis},
     pages = {141--157},
     year = {2006},
     volume = {23},
     zbl = {1115.65049},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2006__23__a10/}
}