Phase transitions of -intercalated crystals S. van Smaalen, R. E. Dinnebier, W. Schnelle, I. Holleman, G. von Helden and G. Meijer Europhys. Lett., 43 3 (1998) 302-307 Published online: 01 September 2002 DOI: 10.1209/epl/i1998-00356-y