A 2-chain can interlock with a k-chain - Julie Glass; Stefan Langerman; Joseph O'Rourke; Jack Snoeyink; Jianyuan K. Zhong (CoRR, 2004)

A 2-chain can interlock with an open 10-chain. - Bin Lu; Joseph O'Rourke; Jianyuan K. Zhong (CoRR, 2013)