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, octubre 1992, pp. 568-570.

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

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