Analysis of hadron production in nucleus-nucleus interactions up to and   out of kinematical limit of free NN-collisions in the frame of FRITIOF model
  In the framework of the modified FRITIOF model, the inclusive spectra of the cumulative $\pi ^0$-, $\pi ^- $-mesons and protons produced in the nucleus-nucleus interactions at 4.5 GeV/c/nucleon and 4.2 GeV/c/nucleon are calculated. It is shown that the model reproduces qualitatively, and in some cases quantitatively the main experimental regularities of $\pi$-mesons production, and "soft" part of the proton spectra. According to the model the production of the cumulative particles is connected with the mechanism of the "soft" nucleon-nucleon interaction. 
A.S. Galoyan, G.L. Melkumov, V.V. Uzhinskii