Soccer Ball Geometry,a Matter of Morphology

Tarnai T. , Cutting patterns for inflatables: Soccer ball designs, Int. IASS Conference, Bucharest, 6–10 September 2005, p.765–772.

Schaper H. Schaper F. , Inflatable ball for ball games, in particular football, International Patent Application PCT/NL93/00147, 9 July 1992.

Obermann G. , Sport und Spielball, German Patent Application 6 89 08 027.0, 30 June 1989.

Huybers P. , The chiral polyhedra, IASS Journal, vol. 40, No. 2, August 1999, p. 133–143 (Awarded with the Tsuboi Price 2000 of IASS, Int. Association of Shell and Spatial Structures).

Huybers P. , Ball composed of two types of equilateral parts, Int. Patent Application PCT/NL98/00459, 12 August 1998.

Huybers P. , Ball with improved properties, PCT-request PCT/NL2003/00557, dated 20 August 2002.

Huybers P. , In search of the roundest soccer ball, Int. Conference on Adaptability in Design and Construction, Eindhoven, 3–5 July, 2006, p. 6.115–6.121.