@article{1994-Proper-EvolvPSM,
  author		= "Proper, H.A. and Weide, Th.P. van der",
  title			= "{EVORM -- A Conceptual Modelling Technique for Evolving Application Domains}",
  journal		= "Data \& Knowledge Engineering",
  volume		= "12",
  year			= "1994",
  code			= "icis.93-16",
  research_group	= "iris",
  pages			= "313--359",
  class			= "Journal"
}