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Development of node connecting systems used for spatial structures. Conference proceeding of the 9th Asian Pacific Conference on Shell and Spatial Structures (APCS2009), 31, Nagoya Japan, May 2009. [PUMA: 2009 connecting connection development engineering hwang itke knippers node park spatial structure system]
Investigation and Numerical Analysis of Node Connectors in Free-Form Spatial Structures. In Korean Association for Spatial Structures (KASS) (Eds.), Journal of the Korean Association for Spatial Structures, (7)3:87 – 95, June 2007. [PUMA: 2007 analysis coneector engineering fre-form hwang itke knippers node numerical park peer-reviewed spatial structur]