@article {21973,
	title = {Monitoring Ambient Nitrate Radical by Open-Path Cavity-Enhanced Absorption Spectroscopy},
	journal = {Analytical Chemistry},
	volume = {2019},
	year = {2019},
	pages = {10687-10693},
	url = {https://pubs.acs.org/doi/10.1021/acs.analchem.9b01971},
	author = {Haichao Wang and Lu, Keding}
}
