First Congress of the International Association of Shell Structures (now IASS), Madrid (1959) discussion following presentation of his paper paper ‘New Shapes for Shells’, as quoted by John Chilton, "39 etc… : Heinz Isler’s infinite spectrum of new shapes for shells" (2009) Proceedings of the International Association for Shell and Spatial Structures (IASS) Symposium 2009, Valencia, Evolution and Trends in Design, Analysis and Construction of Shell and Spatial Structures, 28 September – 2 October 2009, Universidad Politecnica de Valencia, Spain, eds. Alberto Domingo, Carlos Lazaro.
Famous Heinz Isler Quotes
As quoted by Tessa Maurer, Elizabeth O'Grady, Ellen Tung, "Inverse Hanging Membrane: The Naturtheater Grötzingen" http://shells.princeton.edu/Grotz.html ( 2013) Evolution of German Shells Forms: Efficiency of Form, Princeton University Dept. Civil and Environmental Engineering.
“New Shapes for Shells.” (1960) Bulletin of the International Association for Shell Structures, no.8, Paper C-3, taken from Tessa Maurer, Elizabeth O'Grady, Ellen Tung, "Inverse Hanging Membrane: Naturtheater Grötzingen" http://shells.princeton.edu/Grotz.html ( 2013) Evolution of German Shells Forms: Efficiency of Form, Princeton University Dept. Civil and Environmental Engineering.
"New Shapes for Shells" (1961) Bulletin of the International Association for Shell Structures, No. 8: pp. 123-130, as quoted by John Chilton, "39 etc… : Heinz Isler’s infinite spectrum of new shapes for shells" (2009) Proceedings of the International Association for Shell and Spatial Structures (IASS) Symposium 2009, Valencia, Evolution and Trends in Design, Analysis and Construction of Shell and Spatial Structures, 28 September – 2 October 2009, Universidad Politecnica de Valencia, Spain, eds. Alberto Domingo, Carlos Lazaro.