Some papers on reaction-diffusion systems:
Renormalisation group approach to reaction-diffusion problems
Scaling of Reaction Zones in the A+B->0 Diffusion-Limited Reaction
Proportion of Unaffected Sites in a Reaction-Diffusion Process
Renormalization Group Study of the A+B->0 Diffusion-Limited Reaction
Theory of Branching and Annihilating Random Walks
Asymptotic form of the approach to equilibrium in reversible recombination reactions