
The Direct Method in Soliton Theory (Cambridge Tracts in Mathematics, Series Number 155): Hirota, Ryogo, Nagai, Atsushi, Nimmo, Jon, Gilson, Claire: 9780521836609: Amazon.com: Books,

Direct Methods in Soliton Theory | SpringerLink,

Glimpses of Soliton Theory (Second Edition) by Alex Kasman,

Exploring the chaotic structure and soliton solutions for (3 + 1)-dimensional generalized Kadomtsev–Petviashvili model | Scientific Reports,

Extraction new solitons and other exact solutions for nonlinear stochastic concatenation model by modified extended direct algebraic method | Optical and Quantum Electronics