1. Accardi, L.: Quantum Markov chains. In: Proceedings of the School of Mathematical Physics, University of Camerino (1974).
2. Accardi, L., Frigerio, A., and Lu Y.-G.: The weak coupling limit as a quantum functional central limit theorem. To appear in Commun. Math. Phys.
3. Accardi, L., Frigerio, A., and Lu Y.-G.: The quantum weak coupling limit (II). Langevin equation and finite temperature case. Preprint University of Rome II (1989).
4. Accardi, L., Frigerio, A., and Lu Y.-G.: On the weak coupling limit for fermions. Preprint University of Rome II (1989).
5. Accardi, L., and Lu Y.-G.: The low density limit: the boson Fock case. Preprint Centro Matematico Vito Volterra, Rome (1989).