Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Iizuka Masayuki and Ishino Kozo,The Calculation Method of Utilance and Luminance Coefficient in Case of the Luminous Ceiling and Luminous Panel,JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN,0019-2341,The Illuminating Engineering Institute of Japan,1968,52,12,700-709,https://cir.nii.ac.jp/crid/1390282679058764416,https://doi.org/10.2150/jieij1917.52.12_700