1) M. Yoshifuji, “Phosphinylidenephosphines (Diphosphenes),” in “Multiple Bonds and Low Coordination in Phosphorus Chemistry,” ed by M. Regitz and O. J. Scherer, Georg Thieme Verlag, Stuttgart (1990), Chap. D9, pp. 321–337.
2) a) L. N. Markovskii, V. D. Romanenko, E. O. Klebanskii, and S. V. Iksanova, Zh. Obshch. Khim., 55, 1867 (1985);
L. N. Markovskii, V. D. Romanenko, E. O. Klebanskii, and S. V. Iksanova, Chem. Abstr., 105, 24355g (1986).
b) L. N. Markovskii, V. D. Romanenko, and A. V. Ruban, Phosphorus and Sulfur, 30, 447 (1987).
3) a) J. Escudie, C. Couret, H. Ranaivonjatovo, M. Lazraq, and J. Satge, Phosphorus and Sulfur, 31, 27 (1987).