@techreport{1988-Falkenberg-TOP,
  author		= "Falkenberg, E.D. and Weide, Th.P. van der",
  title			= "{The TOP Model: A Metamodel for Conservative Data Bases}",
  institution		= "Department of Information Systems, University of Nijmegen, The Netherlands",
  year			= "1988",
  research_group	= "iris",
  class			= "Report"
}