@article {43822,
	title = {Determination of dissolved naphthenic acids in natural waters by using negative-ion electrospray mass spectrometry},
	volume = {85},
	year = {2002},
	pages = {182-187},
	publisher = {Journal of AOAC International },
	url = {http://www.springerlink.com/content/t485u13826r62222/},
	author = {Headley, J. V. and Peru, K. M. and McMartin, D. W. and Winkler, M.}
}
