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References
- ↑ Hartigan, J. A. (1972). "Direct Clustering of a Data Matrix". Journal of the American Statistical Association. 67 (337): 123–129. doi:10.1080/01621459.1972.10481214. ISSN 0162-1459.
- ↑ "John Hartigan's contributions to clustering" (PDF).
- ↑ Barry, Daniel (2005). "A Conversation with John Hartigan". Statistical Science. 20 (4): 418–430. doi: 10.1214/088342304000000242 . ISSN 0883-4237.
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