Frei, Vaclav Über das achtzehnte Hilbertsche Problem. (Czech) Zbl 0314.50007 Pokroky Mat. Fyz. Astron. 20, 260-268 (1975). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 51M20 Polyhedra and polytopes; regular figures, division of spaces 20H15 Other geometric groups, including crystallographic groups PDF BibTeX XML Cite \textit{V. Frei}, Pokroky Mat. Fyz. Astron. 20, 260--268 (1975; Zbl 0314.50007) Full Text: EuDML OpenURL