P. Dittrich, G. Montemezzani, P. Bernasconi, and P. Günter, "Dynamical light induced waveguides by interband photorefraction,"
in Advances in Photorefractive Materials, Effects and Devices, P. Andersen, P. Johansen, H. Pedersen, P. Petersen, and M. Saffman, eds.,
Vol. 27 of Trends in Optics and Photonics
(Optical Society of America, 1999), paper AD1.