@inbook{kasal_xu_1998, title={Modeling of connections with nonlinear, hysteretic, load-dependent behavior and memory: Application in the analysis of frames}, booktitle={Recent advances in understanding full-scale behavior of wood (FPS proceedings; no. 7275).}, publisher={Madison, WI: Forest Products Society}, author={Kasal, B. and Xu, H.}, year={1998} }
 @inbook{kasal_xu_1997, title={A mathematical model of connections with nonlinear nonconservative hysteretic behavior}, booktitle={Earthquake performance and safety of timber structures}, publisher={Madison, WI: Forest Products Society}, author={Kasal, B. and Xu, H.}, year={1997}, pages={105–107} }
 @inproceedings{xu_kasal_1997, title={Hysteretic connection element for the dynamic analysis of frames}, booktitle={Proceedings of the 5th International Colloquium on Stability and Ductility of Steel Structures, vol. 2: SDSS '97: July 29-31, 1997, Nagoya, Japan}, publisher={Tokyo: Japan Society of Steel Construction}, author={Xu, H and Kasal, B.}, year={1997}, pages={1123–1130} }