M. Gabler, and J. Knippers. 13th International Conference on Structural and Geotechnical Engineering, Cairo – Egypt, Ain Shams University Faculty of Engineering, Department of Structural Engineering, (27-29 Dec. 2009)
J. Knippers. The Fifth Middle East Symposium on Structural Composites for Infrastructure Applications – Extend Abstract, page 110 – 111. Cairo, The Egyptian Society of Engineers, (2008)
J. Knippers. The Fourth Middle East Symposium on Structural Composites for Infrastructure Applications., page 48 – 53. Kairo, Ägypten, Egytian Society of Engineers, (2005)