"Kwonhyuk Baik,Naoya Minagawa,Hidetoshi NAKANISHI,Takeshi Yokoi,Sookyung Choi,Takamasa Mikami","Study on hardness of judo floor regarding safety and playability","12th International Symposium on Architectural Interchanges in Asia","Proceedings of the 12th International Symposium on Architectural Interchanges in Asia",,,,"pp. 1367-1372",2018,Oct.