C. Heitzinger, Ch. Ringhofer, S. Selberherr:
"Finite Difference Solutions of the Nonlinear Schrödinger Equation and their Conservation of Physical Quantities";
Communications in Mathematical Sciences, 5 (2007), 4; S. 779 - 788.
http://dx.doi.org/10.4310/CMS.2007.v5.n4.a2Elektronische Version der Publikation:
http://www.iue.tuwien.ac.at/pdf/ib_2007/JB2007_Heitzinger_1.pdf