Diversity of multiwavelength emission bumps in the GRB 100219A afterglow J. Mao, D. Malesani, P. D’Avanzo, S. Covino, S. Li, P. Jakobsson and J. M. Bai A&A, 538 (2012) A1 Published online: 26 January 2012 DOI: 10.1051/0004-6361/201117770