@article {537,
	title = {A Variational Model for the Thermodynamical and Structural Properties of Impurities in Low Temperature Solids},
	journal = {J. Chem. Phys.},
	volume = {98},
	year = {1993},
	pages = {5734-5746},
	doi = {10.1063/1.464866},
	author = {Li, D. H. and G. A. Voth}
}
