1. Babar Collaboration, B. Aubert et al., hep-ex/0607082
2. Belle Collaboration, K. Abe et al., hep-ex/0608031
3. E.V. Beveren, G. Rupp, hep-ph/0606110
4. T. Matsuki, T. Morii, K. Sudoh, hep-ph/0610186
5. P. Colangelo, F.D. Fazio, S. Nicotri, hep-ph/0607245