1. L. Pauling, “The Nature of the Chemical Bond,” 3rd ed., Cornell University Press, Ithaca, N.Y., 1960, pp. 537–540.
2. R. D. Shannon, Acta
Cryst., A
32, 751 (1976).
3. E. Gard, A. Haaland, D. P. Novak, and R. Seip, J.
Organometal.
Chem., 88, 181–189 (1975).
4. A. Almenningen, A. Haaland, and T. Motzfeldt, in “Selected Topics in Structure Chemistry,” Universitets-forlaget, Oslo, 1967, p. 105.
5. A. Almenningen, A. Haaland, and Svein Samdal, J.
Organometal.
Chem., 149, 219–229 (1978).