1. A. Hasegawa, Optical Solitons in Fibers (Springer, Berlin, 1989).
2. A. Hasegawa and Y. Kodama, Solitons in Optical Communications (Clarendon, New York, 1995).
3. Massive WDM and TDM Soliton Transmission Systems, Ed. by A. Hasegawa (Kluwer Academic, Dordrecht, 2000).
4. G. P. Agrawal, Nonlinear Fiber Optics, 3rd ed. (Academic, San Diego, 2001).
5. E. M. Dianov, P. V. Mamyshev, A. M. Prokhorov, and V. N. Serkin, Nonlinear Effects in Fibers (Harwood Academic, New York, 1989).