Larry J. Stockmeyer. On Approximation Algorithms for #P. SIAM Journal on Computing, 14(4):849-861, 1985.
@article{Stockmeyer85, title = {On Approximation Algorithms for #P}, author = {Larry J. Stockmeyer}, year = {1985}, researchr = {https://researchr.org/publication/Stockmeyer85}, cites = {0}, citedby = {0}, journal = {SIAM Journal on Computing}, volume = {14}, number = {4}, pages = {849-861}, }