@InProceedings{MoKl2010a,
AUTHOR = {Momtazi, Saeedah and Klakow, Dietrich},
TITLE = {A Hierarchical Pitman-Yor Language Model for Information Retrieval},
YEAR = {2010},
BOOKTITLE = {Proceedings of International ACM SIGIR Conference on Research and Development in Information Retrieval, Geneva, Switzerland, 2010},
NOTE = {DK} }
