Tushar Deepak Chandra Vassos Hadzilacos Prasad Jayanti Sam Toueg Generalized Irreducibility of Consensus and the Equivalence of t-Resilient and Wait-Free Implementations of Consensus. 333-357 2004 34 SIAM J. Comput. 2 http://epubs.siam.org/sam-bin/dbq/article/34436 db/journals/siamcomp/siamcomp34.html#ChandraHJT04