@article{VIROLAINEN15, author = "Ya. A. Virolainen and Yu. M. Timofeev and A. V. Poberovskii and O. Kirner and M. H{\"o}pfner", title = "Chlorine Nitrate in the Atmosphere over {S}t. {P}etersburg", journal= "Izv. Atmos. Ocean. Phys.", volume = "51", number = "1", pages = "49-56", year = "2015" }