Robert Connelly, Erik D. Demaine, Martin L. Demaine, Sándor P. Fekete, Stefan Langerman, Joseph S. B. Mitchell, Ares Ribó, Günter Rote. Locked and unlocked chains of planar shapes. In Nina Amenta, Otfried Cheong, editors, Proceedings of the 22nd ACM Symposium on Computational Geometry, Sedona, Arizona, USA, June 5-7, 2006. pages 61-70, ACM, 2006. [doi]
Abstract is missing.