1. Magneto-Structural Correlations in Exchange Coupled Systems; Willett, R. D., Gatteschi, D., Kahn, O., Eds.; NATO ASI Series C140; Reidel: Dordrecht, The Netherlands, 1985.
2. Organic and Inorganic Low-Dimensional Crystalline Materials; Delhaès, P., Drillon, M., Eds.; NATO ASI Series B168; Plenum: New York, 1987.
3. Molecular Magnetic Materials; Gatteschi, D., Kahn, O., Miller, J., Eds.; NATO ASI Series E198; Kluwer: Dordrecht, The Netherlands, 1991.