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A.N. Ogurtsov, E.V. Savchenko, E. Sombrowski, S. Vielhauer, and G. Zimmerer, Exciton self-trapping into diatomic and triatomic molecular complexes in xenon cryocrystals: Spectroscopy in Cryocrystals and Matrices, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 1125-1129, (2003)] DOI: https://doi.org/10.1063/1.1619358.