D. Park, J. Knippers, and K. Hwang. Conference proceeding of the 9th Asian Pacific Conference on Shell and Spatial Structures (APCS2009), page 31. Nagoya Japan, (May 2009)
J. Lienhard, and J. Knippers. Proceedings of the International IASS Symposium, International Association for Shell and Spatial Structures, (21-24 May 2012)
J. Lienhard, and J. Knippers. Proceedings of the International IASS Symposium, International Association for Shell and Spatial Structures, (21-24 May 2012)
D. Park, J. Knippers, and K. Hwang. Conference proceeding of the 9th Asian Pacific Conference on Shell and Spatial Structures (APCS2009), page 31. Nagoya Japan, (May 2009)