Singh, H., D. O’Hara,
D. Herlth, J. Bradshaw, S. Sandholm, G. Gregory,
G. Sachse, D. Blade, P. Crutzen, and M. Kanakidou (1992), Atmospheric Measurements of PAN and other Organic Nitrates at High Latitudes: Possible Sources and Sinks,
J. Geophys. Res., 97, 16,511-16.