Koji Kamei Kunihiko Fujita Eva Jettmar Sen Yoshida Kazuhiro Kuwabara Effectiveness of spatial representation in the formation of network communities: experimental study on community organizer. 739-759 2002 14 Interacting with Computers 6 http://dx.doi.org/10.1016/S0953-5438(02)00017-6 db/journals/iwc/iwc14.html#KameiFJYK02