N
[dNH84] Rocco de Nicola and Matthew C. B. Hennessy. Testing Equivalence for Processes. Theoretical Computer Science 34:83-133. Elsevier, 1984. 
@article{tcs34()-DH,
  author =              {de Nicola, Rocco and Hennessy, Matthew C. B.},
  title =               {Testing Equivalence for Processes},
  publisher =           {Elsevier},
  journal =             {Theoretical Computer Science},
  volume =              {34},
  pages =               {83-133},
  year =                {1984},
}
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