00641oam 2200253z- 450 991014314930332120241212215522.097815090871981509087192(CKB)1000000000331757(EXLCZ)99100000000033175720220628c2007uuuu -u- -engAFRICON 2007IEEE9781424409860 1424409861 9781424409877 142440987X Computer Supported Cooperative Work in Design PROCEEDING9910143149303321AFRICON 20072502918UNINA