High-order harmonic generation from organic molecules in ultra-short pulses N. Hay, R. de Nalda, T. Halfmann, K. J. Mendham, M. B. Mason, M. Castillejo and J. P. Marangos Eur. Phys. J. D, 14 2 (2001) 231-240 Published online: 15 May 2001 DOI: 10.1007/s100530170221