Kolpakov, Alexander; Murakami, Jun (2013), "Volume of a doubly truncated hyperbolic tetrahedron", Aequationes Mathematicae, 85 (3): 449–463, doi:10.1007/s00010-012-0153-y, MR3063880
Grünbaum, Branko (1999), "Acoptic polyhedra"(PDF), Advances in discrete and computational geometry (South Hadley, MA, 1996), Contemporary Mathematics, vol. 223, Providence, Rhode Island: American Mathematical Society, pp. 163–199, doi:10.1090/conm/223/03137, ISBN978-0-8218-0674-6, MR1661382; for the three non-convex acoptic hexahedra see p. 7 of the preprint version and Fig. 3, p. 30
Kolpakov, Alexander; Murakami, Jun (2013), "Volume of a doubly truncated hyperbolic tetrahedron", Aequationes Mathematicae, 85 (3): 449–463, doi:10.1007/s00010-012-0153-y, MR3063880
Grünbaum, Branko (1999), "Acoptic polyhedra"(PDF), Advances in discrete and computational geometry (South Hadley, MA, 1996), Contemporary Mathematics, vol. 223, Providence, Rhode Island: American Mathematical Society, pp. 163–199, doi:10.1090/conm/223/03137, ISBN978-0-8218-0674-6, MR1661382; for the three non-convex acoptic hexahedra see p. 7 of the preprint version and Fig. 3, p. 30
Grünbaum, Branko (1999), "Acoptic polyhedra"(PDF), Advances in discrete and computational geometry (South Hadley, MA, 1996), Contemporary Mathematics, vol. 223, Providence, Rhode Island: American Mathematical Society, pp. 163–199, doi:10.1090/conm/223/03137, ISBN978-0-8218-0674-6, MR1661382; for the three non-convex acoptic hexahedra see p. 7 of the preprint version and Fig. 3, p. 30