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, october 1992, pp. 568-570.

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

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

Movable stationery

Vol. 3, N. 1, Movable Book Society, New Brunswick, february 1995.

Movable stationery

Vol. 3, N. 2, Movable Book Society, New Brunswick, march 1995.