Ying Huang, Yao Ma
      Exact multiple wave solutions for the NLS equation
      Applied Mathematical Sciences, Vol. 9, 2015, no. 22, 1087-1095
      http://dx.doi.org/10.12988/ams.2015.411901

Copyright © 2014 Ying Huang and Yao Ma. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.