^原文為:One day in 1926, J. F. Petrie told me with much excitement that he had discovered two new regular polyhedral; infinite but free of false vertices. When my incredulity had begun to subside, he described them to me: one consisting of squares, six at each vertex, and one consisting of hexagons, four at each vertex.
^H. S. M. Coxeter. Discrete groups generated by reflections. Annals of Mathematics, Second Series. Jul., 1934,. Vol. 35 (No. 3): pp. 588-621.请检查|date=中的日期值 (帮助) 引文格式1维护:冗余文本 (link)
^H. S. M. Coxeter, Patrick du Val, H.T. Flather, J.F. Petrie (1938) The Fifty-nine Icosahedra, University of Toronto studies, mathematical series 6: 1–26
^ 7.07.1Deza, Michel. Note on Petri duals and hypercube embeddings of semiregular polyhedra. Symmetry. 2011-01, 22.