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, octobre 1992, pp. 568-570.

Movable stationery

Vol. 1, N. 1, Movable Book Society, New Brunswick, septembre 1993.

Movable stationery

Vol. 1, N. 2, Movable Book Society, New Brunswick, novembre 1993.

Movable stationery

Vol. 2, N. 1, Movable Book Society, New Brunswick, mars 1994.

Movable stationery

Vol. 2, N. 2, Movable Book Society, New Brunswick, juin 1994.

Movable stationery

Vol. 2, N. 3, Movable Book Society, New Brunswick, juin 1994.

Movable stationery

Vol. 2, N. 4, Movable Book Society, New Brunswick, septembre 1994.