31 P. Dimopoulos R. Frezzotti G. Herdoiza V. Lubicz C. Michael D. Palao G.C. Rossi F. Sanfilippo A. Shindler S. Simula C. Tarantino M. Wagner 9999 Lattice QCD determination of m_b, f_B and f_Bs with twisted mass Wilson fermions arXiv:1107.1441