Finite temperature dynamics of vortices in the two dimensional anisotropic Heisenberg modelT. Kamppeter, F. G. Mertens, A. Sánchez, A. R. Bishop, F. Domínguez-Adame and N. Grønbech-JensenEur. Phys. J. B, 7 4 (1999) 607-618DOI: https://doi.org/10.1007/s100510050653