Femtosecond pump-probe spectroscopy for single trapped molecular ions M. Kowalewski, S. Kahra, G. Leschhorn, T. Schätz and R. de Vivie-Riedle EPJ Web of Conferences, 41 (2013) 02028 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134102028