Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL "Keller, Ole","Nonlinear optics in solids : proceedings of the international summer school, Aalborg, Denmark, July 31-August 4, 1989",,Springer-Verlag,1990,Springer series on wave phenomena,,"3540526471,0387526471",,https://cir.nii.ac.jp/crid/1130000797428291968