1. K. Wade, J. Chem. Soc., Chem. Commun. (1971) 792.
2. Structural and Bonding Patterns in Cluster Chemistry
3. K. Wade, M.E. O'Neill, in: R.N. Grimes (Ed.), Metal Interactions with Boron Hydrides, Chap. 1, Plenum, New York, 1982, pp. 1–41.
4. T. Onak, in: E.L. Muetterties (Ed.), Boron Hydride Chemistry, Academic Press, New York, 1973, p. 349 (and refs. therein).