R.C. Constantinescu, S. Hunsche, H.B. van Linden van den Heuvell, H.G. Muller, C. LeBlanc and F. Salin, Highly charged carbon ions formed by femtosecond laser excitation of C60: A Step towards an x-ray laser, Phys. Rev. A 58, 4637-4646 (1998)
D.J. Maas, D.I. Duncan, R.B. Vrijen, W.J. van der Zande and L.D. Noordam, Vibrational ladder climbing in NO by (sub)picosecond frequency-chirped infrared laser pulses, Chem. Phys. Lett. 290, 75-80 (1998)
S. Acco, D.L. Williamson, S. Roorda, W.G.J.H.M. van Sark, A. Polman and W.F. van der Weg, Structural defects and hydrogen clustering in amorphous silicon, J. Non-Cryst. Solids 227-230, 128-132 (1998)
N.A. van Dantzig, P.C.M. Planken and H.J. Bakker, Far-infrared second-harmonic generation and pulse characterization with the organic salt DAST, Opt. Lett. 23, 466-468 (1998)