Complex solitary waves and soliton trains in KdV and mKdV equations Subhrajit Modak, Akhil Pratap Singh and Prasanta Kumar Panigrahi Eur. Phys. J. B, 89 6 (2016) 149 Published online: 13 June 2016 DOI: 10.1140/epjb/e2016-70130-7