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2. E. M. Wise, Assignor to the Wadsworth Watch Case Co.,U.S. Patent 1,577,995, 1926
3. E. M. Wise,Trans. Am. Inst. Min. Metall. Eng., 1929,83, 384–404
4. ‘Gold: Recovery, Properties and Applications’, ed. by E. M. Wise, D. van Nostrand Co. Inc., Princeton, 1964
5. E. Raub, ‘Die Edelmetalle und ihre Legierungen’, Verl. J. Springer, Berlin, 1940