@InProceeding{DeNero2009Hierarchical,
   author = {John DeNero and Alexandre Bouchard-C\^ot\'e},
   title = {{A} {H}ierarchical {D}irichlet {P}rocess {P}rior for a {C}onditional {M}odel of {P}hrase {A}lignment},
   journal = {Workshop on statistical NLP at Advances in Neural Information Processing Systems 21 (NIPS)},
   year = {2009}
}