@techreport{1995-Hofstede-CT,
  author		= "Hofstede, A.H.M. ter and Lippe, E. and Weide, Th.P. van der",
  title			= "{A Categorical Framework for Conceptual Data Modeling: Definition, Application, and Implementation}",
  number		= "CSI--R9512",
  month			= "November",
  institution		= "Computing Science Institute, University of Nijmegen, Nijmegen, The Netherlands",
  year			= "1995",
  code			= "icis.CSI-R9512",
  research_group	= "iris",
  class			= "Report"
}