1. S. Bouwman, “Magnetic materials,” International Science and Technology, Dec. 1962, p. 20.
2. G. A. Stearley, “Magnetic materials,” Materials & Methods, April 1953, p. 115.
3. S. J. Rosenberg, Nickel and Its Alloys, Monograph 106, National Bureau of Standards (1968).
4. W. S. Eberly, “A guide to high-permeability nickel-iron alloys,” Materials in Design Engineering, July 1963, p. 76.
5. Properties of Some Metals and Alloys,The International Nickel Co., Inc. (1968).