1. T. Sjöstrand, P. Edén, C. Friberg, et al., Comput. Phys. Commun. 135, 238 (2001).
2. B. Anderson, G. Gustafson, G. Ingelman, and T. Sjöstrand, Phys. Rep. 97, 31 (1983); Z. Phys. C 20, 317 (1983); H. U. Bengtsson and G. Ingelman, Comput. Phys. Commun. 34, 251 (1985).
3. L. Clavelli, Phys. Rev. D 26, 1610 (1982); C.-R. Ji and R. Amiri, Phys. Rev. D 35, 3318 (1987); Phys. Lett. B 195, 593 (1987); C.-H. Changand Y.-Q. Chen, Phys. Lett. B 284, 127 (1992); Phys. Rev. D 46, 3845 (1992); E. Braaten, K. Cheung, and T.-C. Yuan, Phys. Rev. D 48, 4230 (1993); 48, 5049 (1993); V. V. Kiselev, A. K. Likhoded, and M. V. Shevlyagin, Z. Phys. C 63, 77 (1994); T.-C. Yuan, Phys. Rev. D 50, 5664 (1994); K. Cheung, Phys. Rev. Lett. 71, 3413 (1993); K. Cheungand T.-C. Yuan, Phys. Rev. D 53, 3591 (1996).
4. A. V. Berezhnoy, A. K. Likhoded, and M. V. Shevlyagin, Yad. Fiz. 58, 730 (1995) [Phys. At. Nucl. 58, 672 (1995)]; A. V. Berezhnoy, A. K. Likhoded, and O. P. Yushchenko, Yad. Fiz. 59, 742 (1996) [Phys. At. Nucl. 59, 709 (1996)]; A. V. Berezhnoy, V. V. Kiselev, and A. K. Likhoded, Yad. Fiz. 60, 108 (1997) [Phys. At. Nucl. 60, 100 (1997)]; Z. Phys. A 356, 79 (1996); A. V. Berezhnoy, V. V. Kiselev, A. K. Likhoded, and A. I. Onishchenko, Yad. Fiz. 60, 1889 (1997) [Phys. At. Nucl. 60, 1875 (1997)].
5. C.-H. Chang, Y.-Q. Chen, G.-P. Han, and H.-Q. Jiang, Phys. Lett. B 364, 78 (1995); C.-H. Changand X.-G. Wu, hep-ph/0309121; C.-H. Chang, C. Driouichi, P. Eerola, and X.-G. Wu, Comput. Phys. Commun. 159, 192 (2004).