Kanaev, A., Museur, L., Laarmann, T., & Möller, T. (2006). Ionic chromophores Xe_p⁺ (p ≤ 4) in multishell rare-gas clusters Xe_m(NF₃)_kNe₇₅₀₀ (m, k≤ 100) studied with fluorescence spectroscopy: Clusters. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 32(11), 1426–1433. https://doi.org/10.1063/1.2389018