Yasuyuki Yanagida, Taro Maeda, and Susumu Tachi School of Engineering, The University of Tokyo Transactions of the Virtual Reality Society of Japan, Vol. 4, No. 3, pp. 539-547, September 1999. [in Japanese]
Yasuyuki Yanagida, Taro Maeda, and Susumu Tachi School of Engineering, The University of Tokyo