Maarten Franssen

Castel's ocular harpsichord

Tractrix, N. 3, 1991, pp. 15-77.

Sidney J. Kolpas

David Copperfield's Orient Express Card Trick

The Mathematics Teacher, N. 7, Vol. 85, ottobre 1992, pp. 568-570.

Eric. D. Demaine, Martin L. Demaine e Anna Lubiw

Folding and cutting paper

Proceedings of the Japan Conference on Discrete and Computational Geometry, Waterloo 1998.

Martin Gardner

A Quarter-Century of Recreational Mathematics

Scientific American, agosto 1998, pp. 68-75.