1. J. P. Ebel undY. Volmar, C. r. acad. sci., Paris233, 415 (1951);J. P. Ebel, Y. F. Bassili undY. Volmar, C. r. acad. sci., Paris235, 372 (1952);J. P. Ebel, C. r. acad. sci., Paris234, 621, 732 (1952); Bull. soc. chim. biol.34, 321 (1952); Ann. Biol.28, 113 (1952); Bull. soc. chim. France20, 1, 991, 998, 1089, 1096 (1953); Mikrochim. Acta [Wien]6, 679 (1954);J. P. Ebel, Y. Volmar undY. F. Bassili, Bull. soc. chim. France20, 1085 (1953);J. P. Ebel und J. Colas, C. r. acad. sci., Paris239, 173 (1954).
2. A. E. R. Westman, A. E. Scott undJ. T. Pedley, Chemistry in Can.4, 35 (1952); Analyt. Chemistry24, 1231 (1952);A. E. R. Westman undA. E. Scott, Nature168, 740 (1951).
3. H. Grunze, E. Thilo undW. Wieker, S. B. d. dtsch. Akad. Wiss. 1955.
4. J. P. Crowther, Nature173, 486 (1954); Analyt. Chemistry26, 1383 (1954).
5. E. Karl-Kroupa, Analyt. Chemistry28, 1091 (1956).