1. E. B. Shene, Experimental Investigations on Hydrogen Peroxide, Moscow, (1875).
2. E. J�necke, Rec. trav. chim., 51, 579 (1932).
3. Campetti, Rend. Accad. Lincei, II, 99?102 (1901);
4. Z. phys. Chem., 41, 109 (1902).
5. C. L. Speyers, Am. J. Sci. (4), 14, 294 (1902).