Early emission of rising optical afterglows: the case of GRB 060904B and GRB 070420A. Klotz, B. Gendre, G. Stratta, A. Galli, A. Corsi, B. Preger, S. Cutini, A. Pélangeon, J. L. Atteia, M. Boër and L. PiroA&A, 483 3 (2008) 847-855DOI: https://doi.org/10.1051/0004-6361:20078677
