Thérèse Biedl, Erik Demaine, Martin Demaine, Sylvain Lazard, Anna Lubiw, et al.. A Note on Reconfiguring Tree Linkages: Trees can Lock.
Discrete Applied Mathematics, Elsevier, 2002, 117 (1-3), pp.293-297.
⟨10.1016/S0166-218X(01)00229-3⟩.
⟨inria-00100889⟩