@article{weko_4830_1,
   author	 = "Ito,Toshiaki and Matsuda,Masahisa and Matsui,Yoshimitsu",
   title	 = "New possibility of solving the problem of lifetime ratio τ(Λ_b ) / τ(B_d)",
   journal	 = "Progress of theoretical physics",
   year 	 = "1998",
   volume	 = "99",
   number	 = "2",
   pages	 = "271--280"
}