@unpublished{eprints2558,
            year = {2011},
           title = {Refined theory of packages},
       booktitle = {10th Workshop on Process Algebra and Stochastically Timed Activities (PASTA)},
           pages = {1--7},
          author = {Max Tschaikowski and Mirco Tribastone},
           month = {September},
             url = {http://eprints.imtlucca.it/2558/},
        abstract = {The fluid approximation for PEPA usually considers large populations of simple interacting sequential components characterised by small local state spaces. A natural question which arises is whether it is possible to extend this technique to composite processes with arbitrary large local state spaces. In [1] the authors were able to give a positive answer for a certain class of models. The current paper
will enlarge this class.}
}