@article{HOEPFNER06_ACP_I, author = "M. H{\"o}pfner and B. P. Luo and P. Massoli and F. Cairo and R. Spang and M. Snels and G. {Di Donfrancesco} and G. P. Stiller and T. von Clarmann and H. Fischer and U. Biermann", title = "Spectroscopic evidence for $\beta$--{NAT}, {STS}, and ice in {MIPAS} infrared limb emission measurements of polar stratospheric clouds", journal= "Atmos. Chem. Phys.", volume = "6", pages = "1201-1219", year = "2006" }