@article {220,
	title = {Electron impact ionization cross sections of several ionization stages of Kr, Ar and Fe},
	volume = {348},
	year = {2013},
	month = {Aug 15},
	pages = {1-8},
	publisher = {Elsevier B.V.},
	abstract = {International Journal of Mass Spectrometry, 348 (2013) 1-8. doi:10.1016/j.ijms.2013.02.011},
	url = {http://dx.doi.org/10.1016/j.ijms.2013.02.011},
	author = {Guerra, M and Parente, F. and Santos, J. P.}
}
