5. Acknowledgements

The authors would like to thank Vince Laviano, Nidhi Bhaskar, Steve Deering, Toerless Eckert, and Pekka Savola for their input and careful review. Gli autori desiderano ringraziare Vince Laviano, Nidhi Bhaskar, Steve Deering, Toerless Eckert e Pekka Savola per il loro contributo e l'attenta revisione.