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@article{VM_2004_6_3_a1, author = {G. Lucca}, title = {Symmetrical {Patterns} by {Means} of {Contour} {Plots}}, journal = {Visual Mathematics}, publisher = {mathdoc}, volume = {6}, number = {3}, year = {2004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/VM_2004_6_3_a1/} }
G. Lucca. Symmetrical Patterns by Means of Contour Plots. Visual Mathematics, Tome 6 (2004) no. 3. http://geodesic.mathdoc.fr/item/VM_2004_6_3_a1/