Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) M. Kösters and B. Sturman and P. Werheit and D. Haertle and K. Buse,Optical cleaning of congruent lithium niobate crystals,Nature Photonics,1749-4885,Springer Science and Business Media LLC,2009-08-23,3,9,510-513,https://cir.nii.ac.jp/crid/1361981470993006208,https://doi.org/10.1038/nphoton.2009.142