Sternberg, Saadya Symmetry issues in collapsible origami. (English) Zbl 1274.00027 Symmetry Cult. Sci. 21, No. 4, 345-364 (2010). MSC: 00A66 52C15 51M20 PDFBibTeX XMLCite \textit{S. Sternberg}, Symmetry Cult. Sci. 21, No. 4, 345--364 (2010; Zbl 1274.00027)
Sternberg, Saadya Collapsible origami: symmetry and asymmetry. (English) Zbl 1274.00026 Symmetry Cult. Sci. 20, No. 1-4, 345-360 (2009). MSC: 00A66 52B15 51M20 PDFBibTeX XMLCite \textit{S. Sternberg}, Symmetry Cult. Sci. 20, No. 1--4, 345--360 (2009; Zbl 1274.00026)