Andy Crabtree Steve Benford Chris Greenhalgh Paul Tennent Matthew Chalmers Barry Brown Supporting ethnographic studies of ubiquitous computing in the wild. 60-69 2006 conf/ACMdis/2006 Conference on Designing Interactive Systems http://doi.acm.org/10.1145/1142405.1142417 db/conf/ACMdis/ACMdis2006.html#CrabtreeBGTCB06