1. Iannace, G., Maffei, L., Marletta, L., Sicurella, F.: Caratteristiche acustiche del Teatro Massimo “Bellini” di Catania. In:Proceedings of 34 $${{\rm th}}$$ th Convegno Nazionale dell’Associazione Italiana di Acustica, Florence, Italy (2007)
2. Iannace, G., Ianniello, E.: Sound-focusing effects in the plan of horse-shoe shaped opera theatres. In: Proceedings of Acoustics ’08, Paris, France, pp. 1639–1643 (2008)
3. Cox, T.J.: Concave acoustics. In: Proceedings of 5 $${{\rm th}}$$ th International Symposium on Temporal Design, Sheffield, UK (2011)
4. Wulfrank, T., Orlowski, R.J.: Acoustic analysis of Wigmore Hall, London, in the context of the 2004 refurbishment. In: Proceedings of the Institute of Acoustic, vol. 28(2) (2006)
5. Dato Toscano, Z., Rodonò, U.: Il Teatro Bellini di Catania [in Italian]. Giuseppe Maimone Editore, Catania (1990)