Irlwek, M. and Menges, A.: 2011, Variant Generation and Convergence in Computational Design Processes based on Horst Rittel´s Design Methodology, in: Connecting Brains Shaping the World – Collaborative Design Spaces, EuropIA 13 Conference 2011, Sapienza Universitá di Roma (Italy), 08–10 June 2011, pp. 139-158. (ISBN: 979-1-090094-05-5)