Robert Slagter Margit Biemans G. Henri ter Hofte Evolution in Use of Groupware: Facilitating Tailoring to the Extreme. 68-73 2001 conf/criwg/2001 CRIWG http://computer.org/proceedings/criwg/1351/13510068abs.htm db/conf/criwg/criwg2001.html#SlagterBH01