@article{TUW-107524, author = {Heitzinger, Clemens and Ringhofer, Ch.}, title = {{A} {N}ote on the {S}ymplectic {I}ntegration of the {N}onlinear {S}chr{\"o}dinger {E}quation}, journal = {{J}ournal of {C}omputational {E}lectronics}, year = {2004}, volume = {3}, number = {1}, pages = {33--44}, url = {http://www.iue.tuwien.ac.at/pdf/ib_2004/JB2004_Heitzinger_2.pdf} }