Broy91'

@article{DBLP:journals/fac/Broy91,
  author    = {Manfred Broy},
  title     = {Towards a Formal Foundation of the Specification and Description
               Language SDL},
  journal   = {Formal Asp. Comput.},
  volume    = {3},
  number    = {1},
  year      = {1991},
  pages     = {21-57},
  ee        = {http://dx.doi.org/10.1007/BF01211434},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}