Cumulative Progress in Language Models for Information Retrieval Antti Puurula author 2013-12 text Proceedings of the Australasian Language Technology Association Workshop 2013 (ALTA 2013) Sarvnaz Karimi editor Karin Verspoor editor Brisbane, Australia conference publication puurula-2013-cumulative https://aclanthology.org/U13-1013/ 2013-12 96 100