@article {677, title = {Calculation of Equilibrium Averages with Feynman-Hibbs Effective Classical Potentials and Similar Variational Approximations}, journal = {Phys Rev A}, volume = {44}, number = {8}, year = {1991}, note = {Voth Journal article Physical review. A Phys Rev A. 1991 Oct 15;44(8):5302-5305.}, pages = {5302-5305}, doi = {10.1103/PhysRevA.44.5302}, author = {G. A. Voth} }