Numerical analysis of magnetic states mixing in the Heisenberg model with the dihedral symmetry W. Florek, L.A. Kaliszan, K. Jaśniewicz-Pacer and M. Antkowiak EPJ Web of Conferences, 40 (2013) 14003 Published online: 14 January 2013 DOI: 10.1051/epjconf/20134014003