Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Jun'ichiro Seyama and Takao Sato,Shape from shading: estimation of reflectance map,Vision Research,0042-6989,Elsevier BV,1998-12,38,23,3805-3815,https://cir.nii.ac.jp/crid/1360011143867160832,https://doi.org/10.1016/s0042-6989(97)00435-5