Meson-Baryon Effective Chiral Lagrangians to O(q^3)
  We construct the complete and minimal O(q^2) and O(q^3) three-flavour Lorentz invariant chiral meson-baryon Lagrangians for the first time in the literature. We compare with previous three-flavour studies reducing the number of independent monomials and adding new ones that were missing. 
Jose Antonio Oller, Michela Verbeni, Joaquim Prades