@incollection{declarative,
  title = "Declarative languages in education",
  author = "H. Glaser and P. H. Hartel and M. Leuschel and A. Martin",
  year = "2000",
  address = "New York",
  booktitle = "Encyclopaedia of Microcomputers",
  pages = "79--102",
  publisher = "Marcel Dekker Inc.",
  volume = "27",
}