The effect of quark exchange in A = 3 mirror nuclei and neutron/proton structure functions ratio M. Modarres, M. M. Yazdanpanah and F. Zolfagharpour Eur. Phys. J. A, 28 2 (2006) 205-211 Published online: 12 June 2006 DOI: 10.1140/epja/i2006-10039-3