Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YOSHIMURA Momoko and KASAHARA Shinichi,ENHANCED RAY TRACING ALGORITHM TO GENERATE PENUMBRA BY POINT LIGHT,Journal of Environmental Engineering (Transactions of AIJ),13480685,Architectural Institute of Japan,2016,81,724,563-572,https://cir.nii.ac.jp/crid/1390001205200973440,https://doi.org/10.3130/aije.81.563