Weissflog, L., Elanskii, N. F., Kotte, K., Keppler, F., Pfennigsdorff, A., Lange, K., Putz, E., & Lisitzina, L. V. (2009). Late Permian changes in conditions of the atmosphere and environments caused by halogenated gases. Dokladi Earth Sciences, 425, 291-295.