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\bibitem{Huang_etal2020} {\textquotedblleft}\textit{A superellipse with deformation and its application in describing the cross-sectional shapes of a square bamboo}{\textquotedblright}. Huang W, Li Y, Niklas KJ, Gielis J, Ding Y, Cao L, Shi P, Symmetry-Basel \textbf{12}, 2073 (2020).   http://doi.org/10.3390/SYM12122073

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