Superquadrics with rational and irrational symmetry. - Johan Gielis; Bert Beirinckx; Edwin Bastiaens (Symposium on Solid Modeling and Applications, 2003)

Variational superformula curves for 2D and 3D graphic arts. - Johan Gielis; Edwin Bastiaens; Tom Krikken; Albert Kiefer; Marc de Blochouse (SIGGRAPH Posters, 2004)