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\bibitem[{Cesta et~al.}(2011){Cesta, Fratini, Orlandini, Finzi \& Tronci}]{Cesta_etal2011} Amedeo Cesta, Simone Fratini, Andrea Orlandini, Alberto Finzi, and Enrico Tronci. "Flexible Plan Verification: Feasibility Results." \textit{Fundamenta Informaticae} 107, no. 2 (2011): 111--137. DOI: 10.3233/FI-2011-397.

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