Width of Theta - pentaquarks in relativistic quark model
  The relativistic generalization of Faddeev-Yakubovsky approach is constructed in the form of the dispersion relations. The five-quark amplitudes for the low-lying pentaquarks contain u,d,s-quarks. The poles of these amplitudes determine the masses and widths of Theta-pentaquarks. 
S. M. Gerasyuta, V. I. Kochkin