Reiko Hattori Yuya Ota Toru Fujii Hiroshi Nakajima Anomaly Ranking of Failure Causes in Manufacturing Process Using Causal Model. 34-39 2021 SMC https://doi.org/10.1109/SMC52423.2021.9659060 conf/smc/2021 db/conf/smc/smc2021.html#HattoriOFN21