Media type: E-Article Title: Cooperative prototyping: users and designers in mutual activity Contributor: Bødker, Susanne; Grønbæk, Kaj imprint: Elsevier BV, 1991 Published in: International Journal of Man-Machine Studies Language: English DOI: 10.1016/0020-7373(91)90030-b ISSN: 0020-7373 Origination: Footnote: