1. A. Okushi, S. Tokunaga, S. Matsumoto, and M. Nakamura, “Sma-Sho: Implementation and Evaluation of a Shopping Support Service Using Receipt Log,” Asia-Pacific Symp. on Information and Telecommunication Technologies, Nov. 2012.
2. S. Tokunaga, S. Matsumoto, and M. Nakamura, “Implementation and Evaluation of Consumer-Oriented Lifelog Service Using Daily Receipts,” The 13th Int. Conf. on Information Integration and Web-based Applications & Services, pp. 337-340, December 2011.
3. S. Tokunaga, A. Okushi, S. Saiki, S. Matsumoto, and M. Nakamura, “Consumer-Oriented ReceiptLog Service Platform for Effective Applications,” Joint 7th Int. Conf. on Soft Computing and Intelligent Systems and 15th Int. Symp. on Advanced Intelligent Systems, pp. 398-403, December 2014.
4. F. Chen and T. Ou, “Sales forecasting system based on Gray extreme learning machine with Taguchi method in retail industry,” Expert Systems with Applications, Vol.38, No.3, pp. 1336-1345, 2011.
5. A. M. Hughes, “Strategic Database Marketing,” McGraw-Hill Inc., 1994.