\input zb-basic \input zb-ioport \iteman{io-port 50207581} \itemau{Brugnano, Luigi; Iavernaro, Felice; Trigiante, Donato} \itemti{A note on the efficient implementation of Hamiltonian bvms} \itemso{J. Computational Applied Mathematics 236, No. 3, 375-383 (2011).} \itemcc{} \itemut{} \itemli{doi:10.1016/j.cam.2011.07.022} \end