1. CDF collaboration, F. Abe et al., Observation of the B c meson in $ p\bar{p} $ collisions at $ \sqrt {s} = 1.8\;TeV $ , Phys. Rev. Lett. 81 (1998) 2432 [ hep-ex/9805034 ] [ SPIRES ].
2. G.T. Bodwin, E. Braaten and G.P. Lepage, Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium, Phys. Rev. D 51 (1995) 1125 [Erratum ibid. D 55 (1997) 5853] [ hep-ph/9407339 ] [ SPIRES ].
3. N. Isgur, D. Scora, B. Grinstein and M.B. Wise, Semileptonic B and D decays in the quark model, Phys. Rev. D 39 (1989) 799 [ SPIRES ].
4. M. Lusignoli and M. Masetti, B c decays, Z. Phys. C 51 (1991) 549 [ SPIRES ].
5. C.-H. Chang and Y.-Q. Chen, The decays of B c meson, Phys. Rev. D 49 (1994) 3399 [ SPIRES ].