[en] This paper presents a general perturbation method for the kinetic analysis of the role played by the dissipative effects in non-linear wave-wave interactions. The 'third order' collisional contributions to coupling coefficients are thus rigorously calculated for a weakly ionized medium and for the resonant three-wave coupling, and it is shown how these results can be extended to other physical models and to other types of wave-wave interaction. (Auth.)