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. 2015 Nov 19;5:16956. doi: 10.1038/srep16956

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(a,b) is the first transforming form (T₁), and (a,c) is the second one (T₂). The numbers in the brackets in (a–c) are the number of edges of the faces. (d) the positions where T₁ and T₂ might happen for <0,0,12,0> transformed to <0,6,0,8>.