Frantzeskakis DJ, Sphicopoulos T. Nonlinear self-phase modulation in optical soliton systems with lumped amplifiers. Optics Communications [Internet]. 1993;101:337-341. Website

Fangos PV, Frantzeskakis DJ, CAPSALIS CN. Pulse propagation in a nonlinear optical fiber of parabolic index profile by direct numerical solution of the Gel'fand-Levitan integral equations. IEE proceedings. Part J, Optoelectronics [Internet]. 1993;140:141-149. Website