Bin He Weiguo Rui Shaolin Li Chan Chen Bounded travelling wave solutions for a modified form of generalized Degasperis-Procesi equation. 113-123 2008 206 Applied Mathematics and Computation 1 http://dx.doi.org/10.1016/j.amc.2008.08.042 db/journals/amc/amc206.html#HeRLC08