Nobutatsu Nakamura Kozo Satoda Ryuichi Hiraike Keiji Nemoto Ladakh: An internet 3D multiuser system. 52-60 1999 30 Systems and Computers in Japan 3 http://dx.doi.org/10.1002/(SICI)1520-684X(199903)30:3<52::AID-SCJ6>3.0.CO;2-0 db/journals/scjapan/scjapan30.html#NakamuraSHN99