@InProceedings{maas-EtAl:2015:NAACL-HLT,
    author    = {Maas, Andrew  and  Xie, Ziang  and  Jurafsky, Dan  and  Ng, Andrew},
    title     = {Lexicon-Free Conversational Speech Recognition with Neural Networks},
    booktitle = {North American Association for Computational Linguistics - Human Language Technologies (NAACL-HLT)},
    year      = {2015},
    pages     = {345--354},
    url       = {pubs/maas15.pdf}
}