Bi-directional Cross Language Question Answering using a Single Monolingual QA System. - Kei Shimizu; Tomoyosi Akiba; Atsushi Fujii; Katunobu Itou (NTCIR, 2005)

Statistical Machine Translation based Passage Retrieval for Cross-Lingual Question Answering — Experiments at NTCIR-6. - Tomoyosi Akiba; Kei Shimizu; Atsushi Fujii; Katunobu Itou (NTCIR, 2007)

Statistical Machine Translation based Passage Retrieval for Cross-Lingual Question Answering. - Tomoyosi Akiba; Kei Shimizu; Atsushi Fujii (IJCNLP, 2008)