1. Symmetries and Differential Equations;Bluman,1989
2. Solitons; Nonlinear Evolution Equations and Inverse Scattering;Ablowitz,1991
3. Darboux Transformation and Solitons;Matveev,1991
4. Direct Methods in Soliton Theory;Hirota,2004
5. (2+1)-dimensional Burgers equations BE (m+n+1): using the recursion operator;Wazwaz;Appl. Math. Comput.,2013