Exploring Higher-Lying Electronic States of a Molecular Switch by Coherent Triggered-Exchange 2D Electronic SpectroscopyS. Ruetzel, M. Kullmann, J. Buback, P. Nuernberger and T. BrixnerEPJ Web of Conferences, 41 (2013) 05001DOI: https://doi.org/10.1051/epjconf/20134105001