?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Hoang%2C+Thai+Son&rft.aulast=Hoang&rft.aufirst=Thai+Son&rft.date=2012&rft.atitle=Security+Invariants+in+Discrete+Transition+Systems&rft.title=Formal+Aspects+of+Computing&rft.genre=article<script src='//archive-bar.soton.ac.uk/archive-bar.js'></script>