1. S. Leupold, Phys. Rev. C64 (2001) 015202.
2. S. Zschocke, O.P. Pavlenko and B. Kampfer, Phys. Lett. B562 (2003) 57.
3. S. Boiarinov et al., Jefferson Lab Proposal E-01-112 (2001), unpublished;
4. C. Tur, D. Weygand, M. Wood and C. Djalali, priv. communication (2004). unpublished;
5. C. Tur, D. Weygand, M. Wood and C. Djalali, priv. communication (2004).