Arzumanyan, Grigory, et al. “Synthesis of NaYF4:Yb,Er@SiO2@Ag Core-Shell Nanoparticles for Plasmon-Enhanced Upconversion Luminescence in Bio-Applications”. Annals of Biomedical Science and Engineering, vol. 3, no. 1, Oct. 2019, pp. 013-9, doi:10.29328/journal.abse.1001006.