Femtosecond time-resolved photoelectron spectra of ammonia molecules and clustersV. Stert, W. Radloff, Th. Freudenberg, F. Noack, I. V. Hertel, C. Jouvet, C. Dedonder-Lardeux and D. SolgadiEurophys. Lett., 40 5 (1997) 515-520DOI: https://doi.org/10.1209/epl/i1997-00497-y