BibTex format
@article{Tisch:1993,
author = {Tisch, JGW and Smith, RA and Ciarrocca, M and Marangos, JP and Hutchinson, MHR},
journal = {Osa Proceedings on Shortwavelength V: Physics with Intense Laser Pulses},
pages = {118--121},
title = {High-order harmonic-generation in helium},
volume = {17},
year = {1993}
}