Is BP.+<i>P</i> a Probabilistic Class?

V. Vinay Is BP.+<i>P</i> a Probabilistic Class? 261-265 1991 conf/fsttcs/1991 FSTTCS db/conf/fsttcs/fsttcs91.html#Vinay91 http://dx.doi.org/10.1007/3-540-54967-6_73