Susumu Takeuchi Yuuichi Teranishi Kaname Harumoto Shinji Shimojo Masanori Akiyoshi Norihisa Komoda In-house communication support system utilizing social network. 375-381 2007 conf/wecwis/2007 CEC/EEE http://doi.ieeecomputersociety.org/10.1109/CEC-EEE.2007.55 db/conf/wecwis/cec2007.html#TakeuchiTHSAK07