@article{LOPEZ-PUERTAS05_JGR_HN, author = "M. L{\'o}pez-Puertas and B. Funke and S. Gil-L{\'o}pez and T. von Clarmann and G. P. Stiller and M. Höpfner and S. Kellmann and G. {Mengistu Tsidu} and H. Fischer and C. H. Jackman", title = "{HNO}$_3$, {N}$_2${O}$_5$ and {ClONO}$_2$ Enhancements after the {O}ctober--{N}ovember 2003 Solar Proton Events", journal= "J. Geophys. Res.", volume = "110", number = "A9", eid = "A09S44", doi = " 10.1029/2005JA011051", year = "2005" }