@conference {hubbard2002focusing,
	title = {Focusing of intense laser pulses using plasma channels},
	booktitle = {AIP Conference Proceedings},
	volume = {647},
	number = {1},
	year = {2002},
	pages = {664{\textendash}673},
	publisher = {American Institute of Physics},
	organization = {American Institute of Physics},
	author = {Hubbard, Richard F and Hafizi, Bahman and Ting, Antonio and Gordon, Daniel F and Jones, Theodore G and Kaganovich, Dmitri and Penano, Joseph R and Sprangle, Phillip and Zigler, Arie}
}
