Positive and negative ion formation via slow electron collisions with 5-bromouridine S. Denifl, P. Candori, S. Ptasińska, P. Limão-Vieira, V. Grill, T. D. Märk and P. Scheier Eur. Phys. J. D, 35 2 (2005) 391-398 Published online: 26 July 2005 DOI: 10.1140/epjd/e2005-00205-7