?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Butler%2C+Michael&rft.aulast=Butler&rft.aufirst=Michael&rft.issue=1&rft.volume=20&rft.date=January+2008&rft.atitle=An+Incremental+Development+of+the+Mondex+System+in+Event-B&rft.title=Formal+Aspects+of+Computing&rft.pages=61-77&rft.genre=article<script src='//archive-bar.soton.ac.uk/archive-bar.js'></script>