1. See for example: (a) R. Roskoski Jr., Biochemistry, W.B. Saunders Company, New York, 1996;
2. (b) T.P. Kee, Chem. Br. 32 (1996) 41 and references therein;
3. (c) R.L. Hilderbrand (Ed.), The Role of Phosphonates in Living Systems, CRC Press, Boca Raton, FL, 1983;
4. (d) R. Engel, Chem. Rev. 77 (1977) 349;
5. (e) G.M. Blackburn, Chem. Ind. (1981) 134.