The N-soliton solution of extended Korteweg-de Vries equation and SAR image simulation of internal solitary wave propagationYuping Zhang, Xingxing Nie, Guangmei Wei and Ruiping LiuEur. Phys. J. Appl. Phys., 67 3 (2014) 31101DOI: https://doi.org/10.1051/epjap/2014130358