1. Essentially symplectic boundary value methods for linear Hamiltonian systems;Brugnano;J. Comput. Math.,1997
2. L. Brugnano, Is symplecticness sufficient for approximating Hamiltonian systems? Non-linear Differential Equations Appl. 3, 1–2 (1997) 39–48.
3. Block boundary value methods for linear Hamiltonian systems;Brugnano;Appl. Math. Comput.,1997
4. L. Brugnano, D. Trigiante, Solving Differential Problems by Multistep Initial and Boundary Value Methods, Gordon and Breach Science Publishers, Amsterdam, 1998.
5. Error growth in the numerical integration of periodic orbits by multistep methods, with application to reversible systems;Cano;IMA J. Numer. Anal.,1998