Tonight I have re-read Richard Buchanan's article "Wicked Problems in Design Thinking". I have not read it since 92-93. In my memory it has always been an outstanding paper. Now when I read it again, it makes me inspired and stimulated. It is an unusually insightful text on design. I highly recommend it.
Richard Buchanan. (1992) "Wicked Problems in Design Thinking", in Design Issues, Vol. 8, No. 2. pp.5-21.