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\bibitem{Fougerolle_etal2017} {\textquotedblleft}\textit{Potential fields of self intersecting Gielis curves for modeling and generalized blending techniques}{\textquotedblright}. Fougerolle Y, Truchetet F, Gielis J, Modeling In Mathematics \textbf{2}, 67 (2017).   http://doi.org/10.2991/978-94-6239-261-8_6

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