S. Bernhardt, P. Delaye, H. Hesse, D. Rytz, and G. Roosen, "Photorefractive two beam coupling characterization of a Barium-Calcium Titanate crystal,"
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 MC23.