1. Delachanal, B., andA. Mermet: Ann. Chim. Phys.12, 108 (1877).
2. Desains: cf. Beilsteins Handbuch der Organischen Chemie, Vol. III, p. 214.
3. Foster, L. S.: Dept. of Mining and Metallurgy Res. Tech. Paper No. 2 ppn. of Xanthates and Thiocarbonates (1927). (cited from Gaudin's Text Book on Flotation, p. 224).
4. Furman, N. H., andJ. H. Wallace: J. Amer. chem. Soc.53, 1283 (1931).
5. Hinsvark, O. N., andK. G. Stone: Analyt. Chemistry28, 334 (1956); cf. Z. analyt. Chem.153, 313 (1956).