Superposition in nonlinear wave and evolution equations
  Real and bounded elliptic solutions suitable for applying the Khare-Sukhatme superposition procedure are presented and used to generate superposition solutions of the generalized modified Kadomtsev-Petviashvili equation (gmKPE) and the nonlinear cubic-quintic Schroedinger equation (NLCQSE). 
H. W. Schuermann (1), V. S. Serov (2), J. Nickel (1) ((1) University   of Osnabrueck, (2) University of Oulu)