Stuffed fullerene structures for medium-sized silicon clusters J. Zhao, J. Wang, J. Jellinek, S. Yoo and X. C. Zeng Eur. Phys. J. D, 34 1-3 (2005) 35-37 Published online: 13 July 2005 DOI: 10.1140/epjd/e2005-00113-x