Design-relevant characteristics of ageing users : backgrounds and guidelines for product innovation / L.P.A. Steenbekkers and C.E.M. van Beijsterveldt (ed.)The design of home appliances for young and old consumers / Adinda FreudenthalThe design of home appliances for young and old consumers / Adinda FreudenthalProceedings of the first international conference on design & emotion / ed. by C.J. Overbeeke, P. HekkertSeries in industrial design / Delft University of Technology, [Department of Industrial Design Engineering]Medisign Delft : products for healthcare at the faculty of Industrial Design Engineering 1997-2002 / R.H.M. Goossens, M.A. van Veelen, C.J. Snijders