Vector and axial nucleon form factors: A duality constrained parameterization A. Bodek, S. Avvakumov, R. Bradford and H. Budd Eur. Phys. J. C, 53 3 (2008) 349-354 Published online: 15 December 2007 DOI: 10.1140/epjc/s10052-007-0491-4