1. V. Alexandrov, “An example of a flexible polyhedron with nonconstant volume in the spherical space,” Beitr. Algebra Geom. 38 (1), 11–18 (1997).
2. V. Alexandrov, “The Dehn invariants of the Bricard octahedra,” J. Geom. 99 (1–2), 1–13 (2010); arXiv: 0901.2989 [math.MG].
3. V. Alexandrov and R. Connelly, “Flexible suspensions with a hexagonal equator,” Ill. J. Math. 55 (1), 127–155 (2011); arXiv: 0905.3683 [math.MG].
4. V. G. Boltianskii, Hilbert’s Third Problem (Nauka, Moscow, 1977; V. H. Winston & Sons, Washington, D.C., 1978), Scripta Ser. Math.
5. R. Bricard, “Mémoire sur la théorie de l’octaèdre articulé,” J. Math. Pures Appl., Sér. 5, 5 (3), 113–148 (1897).