1. Ramm E., Shape finding of concrete shell roofs. J IASS 2004; 5:29-39.
2. Isler H. Generating shell shapes by physical experiments. Bull IASS 1993; 34:53-63.
3. Chilton J. The engineer's contribution to contemporary architecture: Heinz Isler. London:Thomas Telford Press; 2000.
4. Ohmori. H. Computational morphogenesis: Its current state and possibility for the future, IASS-IACM 2008: “Spanning Nano to Mega”, Cornell University, NY, USA.
5. On shape finding methods and ultimate load analysis of reinforced concrete shells;Ramm;Engineering Structures,1991