*Skilling, John (1976), «Uniform Compounds of Uniform Polyhedra», Mathematical Proceedings of the Cambridge Philosophical Society79: 447-457, MR0397554, doi:10.1017/S0305004100052440..
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*Skilling, John (1976), «Uniform Compounds of Uniform Polyhedra», Mathematical Proceedings of the Cambridge Philosophical Society79: 447-457, MR0397554, doi:10.1017/S0305004100052440..