Yoko Nishihara, Kazuki Iwasa, Junichi Fukumoto, Ryosuke Yamanishi: Harmful Comments Extraction from a Bulletin Board System using Word Meaning and Impression on Thread Context, 2014 Joint 7th International Conference on Soft Computing and Intelligent Systems (SCIS) and 15th International Symposium on Advanced Intelligent Systems(ISIS), pp.1398-1402, 2014年6月