1. F. P. Sorkin, Khim. Zsurn. Szer. B. Zsurn. Prikladnoj Khimii9, 1505 (1936); Chem. Zbl.1937 II, 632.
2. C. Z. Evans und J. S. McHargue, Assoc. Offic. Agr. Chemists30, 308 (1947).
3. J. Flechon and F. A. Kuhnast, Bull. soc. chim. Franc.1976, 739; Chem. Abstr.85, 103424 (1976).
4. H. K. L. Gupta and D. F. Boltz, Mikrochim. Acta [Wien]1974, 415.
5. Hiroyuki Misawa and Hirotada Kanashima, Hokkaido-Ritsu Eisei Kenkyushoho13, 214 (1962); Chem. Abstr.62, 15413 (1965).