Unconventional quantum phases in lattice bosonic mixtures P. Buonsante, S. M. Giampaolo, F. Illuminati, V. Penna and A. Vezzani Eur. Phys. J. B, 68 3 (2009) 427-433 Published online: 18 February 2009 DOI: 10.1140/epjb/e2009-00056-0