A Hierarchy for $$ BPP //\log \!\star $$ B P P / / log ⋆ Based on Counting Calls to an Oracle

Beggs, E., Cortez, P., Costa, J. F., & Tucker, J. V. (2017). A Hierarchy for $$ BPP //\log \!\star $$ B P P / / log ⋆ Based on Counting Calls to an Oracle (pp. 39–56). https://doi.org/10.1007/978-3-319-46376-6_3