@inproceedings{weko_116428_1, author = "土井,章男 and 青野,雅樹 and 浦野,直樹 and 杉本,和敏", title = "Shadow Polygon Reduction Techniques", booktitle = "全国大会講演論文集", year = "1989", volume = "第38回", number = "データ処理", pages = "709--710", month = "mar" }