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\bibitem[{Della Penna et~al.}(2005){Della Penna, Intrigila, Melatti \& Tronci}]{DellaPenna_etal2005} Giuseppe Della Penna, Benedetto Intrigila, Igor Melatti, and Enrico Tronci. "Exploiting Hub States in Automatic Verification." In \textit{Automated Technology for Verification and Analysis: Third International Symposium, ATVA 2005, Taipei, Taiwan, October 4-7, 2005, Proceedings}, edited by D.A. Peled and Y.-K. Tsay, 54--68. Lecture Notes in Computer Science 3707. Springer, 2005. ISSN: 3-540-29209-8. DOI: 10.1007/11562948_7.

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