@article{GDZPPN001187155, title = {Symplectic integration of Hamiltonian wave equations.}, journal = {Numerische Mathematik}, volume = {66}, year = {1993}, pages = {465-492}, zbl = {0831.65099}, url = {http://dml.mathdoc.fr/item/GDZPPN001187155} }
McLachlan, Robert. Symplectic integration of Hamiltonian wave equations.. Numerische Mathematik, Tome 66 (1993) pp. 465-492. http://gdmltest.u-ga.fr/item/GDZPPN001187155/