?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Towards+a+Cookbook+for+Modelling+and+Refinement+of+Control+Problems&rft.creator=Butler%2C+Michael&rft.subject=Refinement&rft.subject=Event-B&rft.subject=Event-B+Examples&rft.publisher=ECS%2C+University+of+Southampton&rft.date=2009-02&rft.type=Monograph&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fdeploy-eprints.ecs.soton.ac.uk%2F108%2F1%2Fcookbook.pdf&rft.identifier=++Butler%2C+Michael++(2009)+Towards+a+Cookbook+for+Modelling+and+Refinement+of+Control+Problems.++Working+Paper.+ECS%2C+University+of+Southampton.++++(Unpublished)++&rft.relation=http%3A%2F%2Fdeploy-eprints.ecs.soton.ac.uk%2F108%2F