N.V. Kononets, V.V. Seminko, P.O. Maksimchuk, A.V. Aslanov, I.I. Bespalova, A.A. Masalov, and Yu.V. Malyukin, Processes of excitation energy transport in EuPO₄ and EuP₃O₉ nanocrystals, Low Temp. Phys. 43, (2017) [Fiz. Nizk. Temp. 43, 1252-1256, (2017)] DOI: https://doi.org/10.1063/1.5001311.