Miklós Ajtai Vitaly Feldman Avinatan Hassidim Jelani Nelson Sorting and Selection with Imprecise Comparisons. 37-48 2009 ICALP (1) http://dx.doi.org/10.1007/978-3-642-02927-1_5 conf/icalp/2009-1 db/conf/icalp/icalp2009-1.html#AjtaiFHN09