1. Hirose, T., Watabe, H., Kawaoka, T.: Automatic Refinement Method of Concept-base Considering the Rule between Concepts and Frequency of Appearance as an Attribute, Technical Report of the Institute of Electronics, Information and Communication Engineers, NLC 2001-93, pp.109–116 (2002)
2. Kojima, K., Watabe, H., Kawaoka, T.: A Method of a Concept-base Construction for an Association System: Deciding Attribute Weights Based on the Degree of Attribute Reliability. Journal of Natural Language Processing 9(5), 93–110 (2002)
3. Watabe, H., Kawaoka, T.: Measuring Degree of Association between Concepts for Commonsense Judgements. Journal of Natural Language Processing 8(2), 39–54 (2001)
4. Horiguchi, A., Tsuchiya, S., Kojima, K., Watabe, H., Kawaoka, T.: Constructing a Sensuous Judgement System Based on Conceptual Processing. In: Computational Linguistics and Intelligent Text Processing (Proc. of CICLing 2002), pp. 86–95. Springer, Heidelberg (2002)
5. Watabe, H., Horiguchi, A., Kawaoka, T.: A Sense Retrieving Method from a Noun for the Commonsense Feeling Judgement System. Journal of Artificial Intelligence 19(2), 73–82 (2004)