E.  DelRe, Ciattoni, A. , and Agranat, A.J. . 2001. ?Anisotropic Charge Displacement Supporting Isolated Photorefractive Optical Needles?. http://search.ebscohost.com/login.aspx?direct=true&db=edswsc&AN=000169185900016&site=eds-live.

Aharon J.  Agranat, Secundo, Lavi , Golshani, Noam , and Razvag, Meir . 2001. ?Wavelength-Selective Photonic Switching In Paraelectric Potassium Lithium Tantalate Niobate?. Optical Materials, 18, Pp. 195 - 197. http://search.ebscohost.com/login.aspx?direct=true&db=edselp&AN=S0925346701001665&site=eds-live.