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2. Atomic and Molecular Clusters, ed. by Elsevier, Amsterdam (1990).
3. and in Ion and Cluster Ion Spectroscopy and Structure, ed. by p. 275, Elsevier, Amsterdam (1989).
4. and in Atomic and Molecular Clusters, ed. by p. 765, Elsevier, Amsterdam (1990).
5. Hydrogen Cluster Ions