?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Jastram%2C+Michael&rft.aulast=Jastram&rft.aufirst=Michael&rft.degree=PhD&rft.date=2012&rft.title=The+ProR+Approach%3A+Traceability+of+Requirements+and+System+Descriptions<script src='//archive-bar.soton.ac.uk/archive-bar.js'></script>