1. A. Berson, S. Smith, K. Thearling. Building Data Mining Applications for CRM, McGraw-Hill Press, New York, 1999.
2. Lange, Kirsten. The Benefits of Crm. Pulp and Paper International, vol. 45, no. 11, pp. 40–42, 2003.
3. M. Tim. Crm Goes Small to Get Big Again. Telephony, vol. 246, no. 19, pp. 32–35, 2005.
4. M. Wu, B. He, S. Chen. A Benchmark Method for One-to-one Marketing Optimization Algorithms. Computer Engineering and Applications, vol. 40, no. 19, pp. 45–47, 2004. (in Chinese)
5. E. John, Mitchell, K. Farwell, D. Ramsden. Interior Point Methods for Large-scale Linear Programming, Technical Report, Mathematical Sciences Rensselaer Polytechnic Institute, Troy, NY, 2004.