en Sloane, N. J. A.; Hardin, R. H.; Duff, T. D. S.; Conway, J. H. (), „Minimal-energy clusters of hard spheres”, Discrete & Computational Geometry, 14 (3): 237–259, doi:10.1007/BF02570704, MR1344734
en Berman, Martin (), „Regular-faced convex polyhedra”, Journal of the Franklin Institute, 291: 329–352, doi:10.1016/0016-0032(71)90071-8, MR0290245; see Table IV, line 71, p. 338
en Fomin, Sergey; Reading, Nathan (), „Root systems and generalized associahedra”, În Miller, Ezra; Reiner, Victor; Sturmfels, Bernd, Geometric combinatorics, IAS/Park City Mathematics Series, 13, Providence, Rhode Island: American Mathematical Society, pp. 63–131, arXiv:math/0505518, doi:10.1090/pcms/013/03, MR2383126; see Definition 3.3, Figure 3.6, and related discussion
en Goldberg, Michael (), „On the space-filling enneahedra”, Geometriae Dedicata, 12 (3): 297–306, doi:10.1007/BF00147314, MR0661535; see polyhedron 9-IV, p. 301
arxiv.org
en Fomin, Sergey; Reading, Nathan (), „Root systems and generalized associahedra”, În Miller, Ezra; Reiner, Victor; Sturmfels, Bernd, Geometric combinatorics, IAS/Park City Mathematics Series, 13, Providence, Rhode Island: American Mathematical Society, pp. 63–131, arXiv:math/0505518, doi:10.1090/pcms/013/03, MR2383126; see Definition 3.3, Figure 3.6, and related discussion
bridgesmathart.org
archive.bridgesmathart.org
en Amir, Yifat; Séquin, Carlo H. (), „Modular toroids constructed from nonahedra”, În Torrence, Eve; Torrence, Bruce; Séquin, Carlo; Fenyvesi, Kristóf, Proceedings of Bridges 2018: Mathematics, Art, Music, Architecture, Education, Culture, Phoenix, Arizona: Tessellations Publishing, pp. 131–138, ISBN978-1-938664-27-4
doi.org
en Sloane, N. J. A.; Hardin, R. H.; Duff, T. D. S.; Conway, J. H. (), „Minimal-energy clusters of hard spheres”, Discrete & Computational Geometry, 14 (3): 237–259, doi:10.1007/BF02570704, MR1344734
en Berman, Martin (), „Regular-faced convex polyhedra”, Journal of the Franklin Institute, 291: 329–352, doi:10.1016/0016-0032(71)90071-8, MR0290245; see Table IV, line 71, p. 338
en Fomin, Sergey; Reading, Nathan (), „Root systems and generalized associahedra”, În Miller, Ezra; Reiner, Victor; Sturmfels, Bernd, Geometric combinatorics, IAS/Park City Mathematics Series, 13, Providence, Rhode Island: American Mathematical Society, pp. 63–131, arXiv:math/0505518, doi:10.1090/pcms/013/03, MR2383126; see Definition 3.3, Figure 3.6, and related discussion
en Goldberg, Michael (), „On the space-filling enneahedra”, Geometriae Dedicata, 12 (3): 297–306, doi:10.1007/BF00147314, MR0661535; see polyhedron 9-IV, p. 301