W. Bruns, and W. Kaim. NATO ASI Series, Series C: Mathematical and Physical Sciences, 343 (Mixed Valency Syst.: Appl. Chem., Phys. Biol):
365--370(1991)
W. Bruns, and W. Kaim. NATO ASI Series, Series C: Mathematical and Physical Sciences, 343 (Mixed Valency Syst.: Appl. Chem., Phys. Biol):
365--370(1991)