The structure of para-hydrogen clusters S. Warnecke, M. B. Sevryuk, D. M. Ceperley, J. P. Toennies, R. Guardiola and J. Navarro Eur. Phys. J. D, 56 3 (2010) 353-358 Published online: 08 December 2009 DOI: 10.1140/epjd/e2009-00300-9