Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Thomas A. Germer and Egon Marx,Ray model of light scattering by flake pigments or rough surfaces with smooth transparent coatings,Applied Optics,0003-6935,Optica Publishing Group,2004-02-20,43,6,1266,https://cir.nii.ac.jp/crid/1361699993516400896,https://doi.org/10.1364/ao.43.001266