en Gaifullin, A. A.; Ignashchenko, L. S. (), „Dehn invariant and scissors congruence of flexible polyhedra”, Trudy Matematicheskogo Instituta Imeni V. A. Steklova, 302 (Topologiya i Fizika): 143–160, doi:10.1134/S0371968518030068, ISBN5-7846-0147-4, MR3894642
en Gaifullin, A. A.; Ignashchenko, L. S. (), „Dehn invariant and scissors congruence of flexible polyhedra”, Trudy Matematicheskogo Instituta Imeni V. A. Steklova, 302 (Topologiya i Fizika): 143–160, doi:10.1134/S0371968518030068, ISBN5-7846-0147-4, MR3894642
en Tachi, Tomohiro (), „Designing rigidly foldable horns using Bricard's octahedron”, Journal of Mechanisms and Robotics, 8 (3): 031008, doi:10.1115/1.4031717