Julius F. Sachse

Jacob Philadelphia, mystic and physicist

Publications of the American Jewish Historical Society, N. 16, American Jewish Historical Society, 1907, pp. 73-94.

Edmund H. Wilkie

Optical illusions

The Magician Annual, 1908, pp. 20-33.

Abbott Handerson Thayer

An arraignment of the theories of mimicry and warning colors

Popular Science Monthly, Vol. 75, The Science Press, New York dicembre 1909, pp. 550-570.