The following publications are possibly variants of this publication:
- Locked and Unlocked Chains of Planar ShapesRobert Connelly, Erik D. Demaine, Martin L. Demaine, Sándor P. Fekete, Stefan Langerman, Joseph S. B. Mitchell, Ares Ribó, Günter Rote. dcg, 44(2):439-462, 2010. [doi]
- Locked and Unlocked Polygonal Chains in 3DTherese C. Biedl, Erik D. Demaine, Martin L. Demaine, Sylvain Lazard, Anna Lubiw, Joseph O Rourke, Mark H. Overmars, Steve Robbins, Ileana Streinu, Godfried T. Toussaint, Sue Whitesides. soda 1999: 866-867 [doi]
- Locked and Unlocked Polygonal Chains in Three DimensionsTherese C. Biedl, Erik D. Demaine, Martin L. Demaine, Sylvain Lazard, Anna Lubiw, Joseph O Rourke, Mark H. Overmars, Steve Robbins, Ileana Streinu, Godfried T. Toussaint, Sue Whitesides. dcg, 26(3):269-281, 2001. [doi]