Metal-insulator transition in the quarter-filled frustrated checkerboard lattice Y. Z. Zhang, Minh-Tien Tran, V. Yushankhai and P. Thalmeier Eur. Phys. J. B, 44 3 (2005) 265-276 Published online: 28 April 2005 DOI: 10.1140/epjb/e2005-00125-4