From Nature to Fabrication: Biomimetic Design Principles for the Production of Complex Spatial Structures. In L. Hesselgren, S. Sharma, J. Wallner, N. Baldassini, P. Bompas, and J. Raynaud (Eds.), Advances in Architectural Geometry 2012, 107--122, Springer, Wien New York, 2012. [PUMA: 2012 architecture biomimetic bionik eichert fabrication gabler itke knippers magna menges nature schwinn spatial structures waimer]