Cyril Allauzen Michael Riley Johan Schalkwyk Wojciech Skut Mehryar Mohri OpenFst: A General and Efficient Weighted Finite-State Transducer Library. 11-23 2007 conf/wia/2007 CIAA http://dx.doi.org/10.1007/978-3-540-76336-9_3 db/conf/wia/ciaa2007.html#AllauzenRSSM07