George Francis Legge

Note on the Coptic spell

Proceedings of The Society Of Biblical Archeology, Vol. XX, 1 marzo 1898, pp. 147-149.

Norman Triplett

The Psicology Of Conjuring Deception

The American Journal of Psychology, N. 4, Vol. 11, Titchener, Boring, and Dallenbach, luglio 1900, pp. 439-510.