@article {136,
	title = {New expression for the K-shell ionization},
	volume = {388},
	number = {4},
	year = {2012},
	month = {Nov 05},
	pages = {042047},
	url = {http://stacks.iop.org/1742-6596/388/i=4/a=042047?key=crossref.9990322f261af791a8aa6f1bf7557637},
	author = {Santos, J. P. and Guerra, M and Parente, F.}
}
