Magnetic interactions in the monoclinic ludwigite Cu2FeO2BO3 M. A. Continentino, J. C. Fernandes, R. B. Guimarães, H. A. Borges, A. Sulpice, J-L. Tholence, J. L. Siqueira, J. B.M. da Cunha and C. A. dos Santos Eur. Phys. J. B, 9 4 (1999) 613-618 Published online: 15 June 1999 DOI: 10.1007/s100510050805