1. a) W. Kirmse, Carbene Chemistry, Academic Press, (1964), (1971);
2. b) M. Jones, Jr., R.A. Moss, Carbenes, Vol. 1 (1973), Vol. 2 (1974) John Wiley;
3. c) M. Jones, Jr., R.A. Moss, Reactive Intermediates, Vol. 1 (1978), Vol. 2 (1981) John Wiley;
4. d) M. Regitz, Methoden der Organischen Chemie (Houben Weyl), Thieme, Stuttgart Vol E19b (1989).
5. For a relevant review, see a) B.B. Wright, Tetrahedron, 41, 1517 (1985); b) M.S. Platz, Acc. Chem. Res., 21, 236 (1988).