Lattice QCD with a twisted mass term and a strange quark A. M. Abdel-Rehim, R. Lewis, R. M. Woloshyn and J. M. S. Wu Eur. Phys. J. A, 31 4 (2007) 773-776 Published online: 12 March 2007 DOI: 10.1140/epja/i2006-10245-y