M. Gabler, and J. Knippers. Book of Abstracts of the 7th International Conference on FRP Cpomposites in Civil Engineering (CICE 2014), page 332. Vancouver, Canada, (2014)
J. Li, and J. Knippers. Proceedings of the International Symposium of the IASS-APCS Symposium, Seoul, Korea, International Association of Shells and Sapatial Structures, (21-24 May 2012)