1. Cherkasov, R.A. and Pudovik, A.N., Usp. Khim., 1994, vol. 63, p. 1087 [Russ. Chem. Rev., 1994, vol. 63, p. 1019].
2. Alabugin, I.V. and Brel, V.K., Usp. Khim., 1997, vol. 66, p. 225 [Russ. Chem. Rev., 1997, vol. 66, p. 205].
3. Levina, E.Ya. and Kibardin, A.M., Usp. Khim., 1999, vol. 68, p. 167 [Russ. Chem. Rev., 1999, vol. 68, p. 149].
4. Bansal, R.K. and Heinicke, J., Chem. Rev., 2001, vol. 101, p. 3549.
5. Phosphorus-Carbon Heterocyclic Chemistry: The Rise of a New Domain, Mathey, F., Ed., Amsterdam: Pergamon, 2001.