How do I write Regex in Python only extracting the reference, strip the citation it:

['For review, R. Fazio and H. van der Zant, Phys. Rep. {\bf 355}, 235 (2001).','S. Teitel and C. Jayaprakash, Phys. Rev. Lett. {\bf 51}, 1999 (1983)','T. C. Halsey, Phys. Rev. B {\bf 31}, 5728 (1985).', and so on]

\bibitem{Fazio} For review, R. Fazio and H. van der Zant, Phys. Rep. {\bf 355}, 235 (2001). \bibitem{Teitel} S. Teitel and C. Jayaprakash, Phys. Rev. Lett. {\bf 51}, 1999 (1983). \bibitem{Halsey1} T. C. Halsey, Phys. Rev. B {\bf 31}, 5728 (1985). \bibitem{Straley} J. P. Straley and G. M. Barnett, Phys. Rev. B {\bf 48}, 3309 (1993). \bibitem{Lee} S. J. Lee {\it et al}., Phys. Rev. Lett. {\bf 88}, 025701 (2001). \bibitem{Halsey} T. C. Halsey, Phys. Rev. Lett. {\bf 55}, 1018 (1985); B. Kim and S. J. Lee, {\it ibid} {\bf 78}, 3709 (1997); C. Denniston and C. Tang, Phys. Rev. B {\bf 60}, 3163 (1999). \bibitem{Santiago} G. Ramirez-Santiago and J.V. Jos\'{e}, Phys. Rev. Lett. {\bf 68}, 1224 (1992); P. Olsson, {\it ibid} {\bf 75}, 2758 (1995); S. E. Korshunov, {\it ibid} {\bf 88}, 167007 (2002). \bibitem{OLreview} M. Lewenstein {\it et al}., Adv. Phys. {\bf 56} 243 (2006); O. Morsch and M. Oberthaler, Rev. Mod. Phys. {\bf 78}, 179 (2006). \bibitem{Anderson} B. P. Anderson and M. A. Kasevich, Science, {\bf 282}, 1686 (1998). \bibitem{Cataliotti} F. S. Cataliotti {\it et al}., Science, {\bf 293}, 843 (2001). \bibitem{Smerzi} A. Trombettoni {\it et al}., New J. Phys. {\bf 7}, 57 (2005). \bibitem{Schweikhard} V. Schweikhard {\it et al}., Phys. Rev. Lett. {\bf 99}, 030401 (2007).