Budijono, Stephanie J, Jingning Shan, Nan Yao, Yutaka Miura, Thomas Hoye, Robert H Austin, Yiguang Ju, and Robert K Prud'homme. “Synthesis of Stable Block-Copolymer-Protected NaYF4:Yb3+, Er3+ Up-Converting Phosphor Nanoparticles.” CHEMISTRY OF MATERIALS 22 (2010): 311-318.