@article {3209,
	title = {Multichannel MRI Labeling of Mammalian Cells by Switchable Nanocarriers for Hyperpolarized Xenon},
	journal = {Nano Letters},
	volume = {14},
	year = {2014},
	pages = {5721-5726},
	author = {Klippel, Stefan and Freund, Christian and Schröder, Leif}
}
