Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) GLASS A. M.,High-voltage bulk photovoltaic effect and the photorefractive process in LiNbO_3,Appl. Phys. Lett.,,,1974,25,,233-235,https://cir.nii.ac.jp/crid/1573387449853708032,