1. Quantitative fuzzy semantics;Zadeh;Inform. Sci.,1971
2. Representation by symbol systems as an extension of the concept of measurement;Finkelstein;Kybernetes,1975
3. The duality of sensing and coding as a fundamental topic of information science;Mari,2001
4. A study of nominal scale;Watanabe,1991
5. Theory of classification to reinterpret the nominal scale for our better understanding of measurement information;Watanabe,2001