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3. B.J. Aylett, Organometallic Compounds, 4th edition, Vol. 1, Part 2, Chapman and Hall, London, 1979, Chapter 3.
4. M. Rivière-Baudet, A. Morère, J.F. Britten, M. Onyszchuk, J. Organomet. Chem. 423 (1992) C5. M. Rivière-Baudet, A. Morère, M. Onyszchuk, J. Satgé, Phosphorus, Sulfur and Silicon 70 (1992) 75.