@article {536,
	title = {A Path integral Einstein Model for Characterizing the Equilibrium States of Low Temperature Solids},
	journal = {The Journal of Chemical Physics},
	volume = {96},
	number = {7},
	year = {1992},
	pages = {5340-5353},
	keywords = {FEYNMAN PATH INTEGRAL VARIATIONAL METHODS SOLIDS EQUILIBRIUM TEMPERATURE DEPENDENCE FREE ENERGY ENTROPY INTERNAL ENERGY ANGULAR CORRELATION IMPURITY STATES HARMONIC OSCILLATORS HYDROGEN USES LITHIUM ENERGY LEVELS FREE ENTHALPY THERMODYNAMIC PROPERTIES},
	doi = {10.1063/1.462719},
	author = {Li, Daohui and Gregory A. Voth}
}
