Two-step laser excitation of the highly excited even-parity states of atomic mercury A. Nadeem, M. Nawaz, S. U. Haq, S. Shahzada and M. A. Baig Eur. Phys. J. D, 53 2 (2009) 147-151 Published online: 17 April 2009 DOI: 10.1140/epjd/e2009-00125-6