DK Riskin, DJ Willis, J. Iriate-Diaz, TL Hedrick, Mykhaylo Kostandov, Jian Chen, David H. Laidlaw, Kenneth Breuer, and Sharon Swartz. Quantifying the complexity of bat wing kinematics. Journal of Theoretical Biology, 2008. In Press (pdf) (bibtex: Riskin-2008-QCB).