Z-scan measurement of the nonlinear refractive indices of micellar lyotropic liquid crystals with and without the ferrofluid doping - Gomez, S. L.; Cuppo, Fábio Luiz Sant'Anna; Figueiredo Neto, Antonio Martins; Kosa, T.; Muramatsu, Mikiya; Horowicz, Ricardo Josué (Physical Review E, 1999)