Edwards, G. D., Shepson, P. B., Grossenbacher, J. W., Wells, J. M., Patterson, G. E., Barket Jr., D. J., … Apel, E. C. (2007). Development of an automated cylindrical ion trap mass spectrometer for the determination of atmospheric volatile organic compounds. Analytical Chemistry, 79, 5040-5050. doi:10.1021/ac0703597