Longo, F., D. Bruneo, S. Distefano, and M. Scarpa,  "Variable operating conditions in distributed systems: Modeling and evaluation",  Concurrency Computation Practice and Experience, vol. 27, no. 10: John Wiley and Sons Ltd, pp. 2506-2530, 2015.

Bruneo, D., S. Distefano, F. Longo, and M. Scarpa,  "Stochastic evaluation of QoS in service-based systems",  IEEE Transactions on Parallel and Distributed Systems - IEEE Computer Society, vol. 24, no. 10, pp. 2090-2099, 2013.