@inproceedings{LanevePadovani13,
  volume = {7940},
  author = {Cosimo Laneve and Luca Padovani},
  series = {LNCS},
  booktitle = {Proceedings of the International Conference on Integrated Formal
               Methods (IFM'13)},
  url = {http://www.di.unito.it/~padovani/Papers/LanevePadovani13.pdf},
  abstract = { We study a natural notion of compliance between clients and
              services in terms of their BPEL (abstract) descriptions. The
              induced preorder shows interesting connections with the must
              preorder and has normal form representatives that are
              parallel-free finite-state activities, called contracts. The
              preorder also admits the notion of least service contract that is
              compliant with a client contract, called principal dual contract.
              Our framework serves as a foundation of Web service technologies
              for connecting abstract and concrete service definitions and for
              service discovery. },
  title = {{An Algebraic Theory for Web Service Contracts}},
  publisher = {Springer},
  year = {2013},
  pages = {301-315},
  doi = {10.1007/978-3-642-38613-8\_21},
}

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