Meson-Meson and Meson-Baryon Interactions in a chiral Non-perturbative   Approach
  A qualitative account of the meson-meson and meson-baryon interactions using chiral Lagrangians and the inverse amplitude method in coupled channels is done. The method, imposing exact unitarity, proves to be very useful tool to extend the information contained in the chiral Lagrangians at energies beyond the realm of applicability of chiral perturbation theory. 
E. Oset, J.A. Oller, J.R. Pelaez and A. Ramos