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2. A. Barlotti, Una proprietà deglin-agoni che si ottengono trasformando in una affinità unn-agono regolare, Boll. Un. Mat. Ital. (3)10 (1955), 96–98.
3. H.S.M. Coxeter, Unvergängliche Geometrie (2. Aufl.), Birkhäuser Basel 1961 (translation of Introduction to Geometry (2nd ed.), Wiley New York 1969).
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5. H.S.M. Coxeter, Regular Complex Polytopes (2nd ed.), Cambridge University Press 1991.