Superfluid to Mott insulator quantum phase transition in a 2D permanent magnetic latticeSaeed Ghanbari, P. Blair Blakie, Peter Hannaford and Tien D. KieuEur. Phys. J. B, 70 3 (2009) 305-310DOI: https://doi.org/10.1140/epjb/e2009-00210-8