Effect of weak disorder on the ground state of uniaxial dipolar spin systems in the upper critical dimensionA. V. Klopper, U. K. Rößler and R. L. StampsEur. Phys. J. B, 50 1-2 (2006) 45-50DOI: https://doi.org/10.1140/epjb/e2006-00123-0