Processes of excitation energy transport in EuPO4 and EuP3O9 nanocrystals - N. V. Kononets; V. V. Seminko; P. O. Maksimchuk; A. V. Aslanov; I. I. Bespalova; A. A. Masalov; Yu. V. Malyukin (Low Temperature Physics, 2017)