Metamagnetic Phase Transition of the Antiferromagnetic Heisenberg Icosahedron
C. Schröder, H.-J. Schmidt, J. Schnack, M. Luban, Physical Review Letters 94 (2005).

Competing Spin Phases in Geometrically Frustrated Magnetic Molecules
C. Schröder, H. Nojiri, J. Schnack, P. Hage, M. Luban, P. Kögerler, Physical Review Letters 94 (2005).