Yuya Kajikawa Yoshihide Sugiyama Hideki Mima Katsumori Matsushima Causal knowledge extraction by natural language processing in material science: a case study in chemical vapor deposition. 108-118 2006 5 Data Science Journal http://www.jstage.jst.go.jp/article/dsj/5/0/5_108/_article db/journals/datascience/datascience5.html#KajikawaSMM06