1. Fild , M.
Schmutzler , R. and
Peake , S. C. 1972. “Organic Phosphorus Compounds”, Edited by:
Kosolapoff , G. M. and
Maier , L. Vol. 4, 155John Wiley & Sons.
2. Sasse , K. and
Weyl , Houben . 1963. Vol. XII/1, 387Stuttgart: Georg Thieme Verlag.
3. Regitz , M. , ed. 1982. Volume E2, 326
4. Dawson , T. P. and
Armstrong , J. W. inv.