@article {cao2012improving,
	title = {Improving Lanthanide Nanocrystals Colloidal Stability in Competitive Aqueous Buffer Solutions Using Multivalent PEG-Phosphonate Ligands},
	journal = {Langmuir},
	volume = {28},
	year = {2012},
	pages = {12861{\textendash}70},
	doi = {10.1021/la302690h},
	author = {P. Cao and L. Tong and Y. Hou and G. Zhao and G. Gu{\'e}rin and M. A. Winnik* and M. Nitz*}
}
