@article{TUW-175439, author = {Steinb{\"o}ck, Andreas and H{\"o}finger, Gerhard and Jia, Xin and Mang, Herbert A.}, title = {Three Pending Questions in Structural Stability}, journal = {Journal of the International Association for Shell and Spatial Strucures}, year = {2009}, volume = {50}, number = {1}, pages = {51--64}, note = {invited} }