?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Structuring+Functional+Requirements+of+Control+Systems+to+Facilitate+Refinement-based+Formalisation+&rft.creator=Yeganefard%2C+Sanaz&rft.creator=Butler%2C+Michael&rft.subject=Requirements+and+evolution&rft.publisher=University+of+Southampton&rft.date=2011&rft.type=Monograph&rft.type=NonPeerReviewed&rft.relation=http%3A%2F%2Feprints.ecs.soton.ac.uk%2F22062%2F&rft.identifier=++Yeganefard%2C+Sanaz+and+Butler%2C+Michael++(2011)+Structuring+Functional+Requirements+of+Control+Systems+to+Facilitate+Refinement-based+Formalisation.++Technical+Report.+University+of+Southampton.++++(Unpublished)++&rft.relation=http%3A%2F%2Fdeploy-eprints.ecs.soton.ac.uk%2F296%2F