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Joseph, Reetu E.; Jiménez, Carlos; Hudry, Damien; Gao, Guojun; Busko, Dmitry; Biner, Daniel; Turshatov, Andrey; Krämer, Karl; Richards, Bryce S.; Howard, Ian A. (2019). Critical Power Density: A Metric To Compare the Excitation Power Density Dependence of Photon Upconversion in Different Inorganic Host Materials. Journal of physical chemistry. A, 123(31), pp. 6799-6811. American Chemical Society 10.1021/acs.jpca.9b03851
