1. Un’ estensione del teorema di Segre-Kustaanheimo;Barlotti;Boll. Unione Mat. Ital.,1955
2. Jürgen Bierbrauer, Large caps, J. Geom. 76, 16–51.
3. Mathematical theory of the symmetrical factorial design;Bose;Sankhyā,1947
4. Ben Coleman, Kevin Hartshorn, Jamie Long, Timothy Mills, Swingset Applet Page. http://www.mathcs.moravian.edu/~swingset/.
5. The card game SET;Davis;Math. Intelligencer,2003