Theoretical Computer ScienceVolume 412, Issue 21, 6 May 2011, Page 2094PrefaceAuthor links open overlay panelPierpaolo DeganoShow moreShareCitehttps://doi.org/10.1016/j.tcs.2011.01.022Get rights and contentUnder an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 2011 Elsevier B.V.