Afterglow rebrightenings as a signature of a long-lasting central engine activity? The emblematic case of GRB 100814A

M. Nardini, J. Elliott, R. Filgas, P. Schady, J. Greiner, Thomas Christian Krühler, S. Klose, P. Afonso, D. A. Kann, A. Nicuesa Guelbenzu, F. Olivares E, A. Rau, A. Rossi, V. Sudilovsky, S. Schmidl