Jacek Cichon Marek Klonowski Miroslaw Kutylowski Distributed Verification of Mixing - Local Forking Proofs Model. 128-140 2008 ACISP http://dx.doi.org/10.1007/978-3-540-70500-0_10 conf/acisp/2008 db/conf/acisp/acisp2008.html#CichonKK08