Sakriani Sakti Satoshi Nakamura Konstantin Markov Wolfgang Minker Incorporating Knowledge Sources into Statistical Speech Recognition 42 2009 1-59 Springer Lecture Notes in Electrical Engineering http://dx.doi.org/10.1007/978-0-387-85830-2 978-0-387-85829-6 db/series/lnee/index.html#SaktiNMM09