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\bibitem{AGO91}
A.~Albano, G.~Ghelli, and R.~Orsini.
\newblock A relationship mechanism for a strongly typed object-oriented
  database programming language.
\newblock In {\em Proceedings of the Seventeenth International Conference on
  Very Large Databases}, pages 565--575, 1991.

\bibitem{ART91}
M.~Atkinson, P.~Richard, and P.~Trinder.
\newblock Bulk types for large scale programming.
\newblock In {\em Proceedings of the Kiev East/West Workshop on Next Generation
  Database Technology}, volume 504 of {\em Lecture Notes in Computer Science},
  April 1991.

\bibitem{Atk*93b}
M.P. Atkinson, P.J. Bailey, D.~Christie, K.~Cropper, and P.C. Philbrow.
\newblock Towards bulk type libraries for {Napier88}.
\newblock FIDE Technical Report Series FIDE/93/78, FIDE Project Coordinator,
  Department of Computing Sciences, University of Glasgow, Glasgow G128QQ,
  1993.

\bibitem{ATW93}
M.P. Atkinson, P.W. Trinder, and D.A. Watt.
\newblock Bulk type constructors.
\newblock FIDE Technical Report Series FIDE/93/61, FIDE Project Coordinator,
  Department of Computing Sciences, University of Glasgow, Glasgow G128QQ,
  1993.

\bibitem{BDK92}
F.~Bancilhon, C.~Delobel, and P.~Kanellakis.
\newblock {\em Building an Object-Oriented Database System: The Story of
  O$_{2}$}.
\newblock Morgan Kaufmann Publishers, 1992.

\bibitem{BeTa94}
C.~Beeri and P.~Ta-Shma.
\newblock Bulk data types, a theoretical approach.
\newblock In C.~Beeri, A.~Ohori, and D.E. Shasha, editors, {\em Proceedings of
  the Fourth International Workshop on Database Programming Languages,
  Manhatten, New York}, Workshops in Computing. Springer-Verlag, February 1994.

\bibitem{BTBN91}
V.~Breazu-Tannen, P.~Buneman, and S.~Naqvi.
\newblock Structural recursion as a query language.
\newblock In {\em Database Programming Languages: Bulk Types and Persistent
  Data}. Morgan Kaufmann Publishers, September 1991.

\bibitem{CMA94}
L.~Cardelli, F.~Matthes, and M.~Abadi.
\newblock Extensible grammars for language specialization.
\newblock In C.~Beeri, A.~Ohori, and D.E. Shasha, editors, {\em Proceedings of
  the Fourth International Workshop on Database Programming Languages,
  Manhatten, New York}, Workshops in Computing, pages 11--31. Springer-Verlag,
  February 1994.

\bibitem{CMR91}
R.~Connor, D.~McNally, and R.~Morrison.
\newblock Subtyping and assignment in database programming languages.
\newblock In {\em Database Programming Languages: Bulk Types and Persistent
  Data}, pages 363--382. Morgan Kaufmann Publishers, 1991.

\bibitem{Fega94}
L.~Fegaras.
\newblock Efficient optimization of iterative queries.
\newblock In C.~Beeri, A.~Ohori, and D.E. Shasha, editors, {\em Database
  Programming Languages, New York City, 1993}, Workshops in Computing, pages
  200--225, 1994.

\bibitem{GaMa96a}
A.~Gawecki and F.~Matthes.
\newblock Exploiting persistent intermediate code representations in open
  database environments.
\newblock In {\em Proceedings of the Fifth Conference on Extending Database
  Technology, EDBT'96}, volume 1057 of {\em Lecture Notes in Computer Science},
  Avignon, France, March 1996. Springer-Verlag.

\bibitem{MaSc91b}
F.~Matthes and J.W. Schmidt.
\newblock Bulk types: Built-in or add-on?
\newblock In {\em Database Programming Languages: Bulk Types and Persistent
  Data}. Morgan Kaufmann Publishers, September 1991.

\bibitem{MaSc93b}
F.~Matthes and J.W. Schmidt.
\newblock System construction in the {Tycoon} environment: Architectures,
  interfaces and gateways.
\newblock In P.P. Spies, editor, {\em Proceedings of Euro-Arch'93 Congress},
  pages 301--317. Springer-Verlag, October 1993.

\bibitem{ScMa94}
J.W. Schmidt and F.~Matthes.
\newblock The {DBPL} project: Advances in modular database programming.
\newblock {\em Information Systems}, 19(2):121--140, 1994.

\bibitem{StSh91}
D.~Stemple and T.~Sheard.
\newblock A recursive base for database programming primitives.
\newblock In {\em Proceedings of the Kiev East/West Workshop on Next Generation
  Database Technology}, volume 504 of {\em Lecture Notes in Computer Science},
  April 1991.

\bibitem{SMRS93}
K.~Subieta, F.~Matthes, A.~Rudloff, J.W. Schmidt, and I.~Wetzel.
\newblock Viewers: A data-world analogue of procedure calls.
\newblock In {\em Proceedings of the Nineteenth International Conference on
  Very Large Databases, Dublin, Ireland}, August 1993.

\bibitem{Trind91}
P.~Trinder.
\newblock Comprehensions, a query notation for {DBPLs}.
\newblock In {\em Database Programming Languages: Bulk Types and Persistent
  Data}. Morgan Kaufmann Publishers, September 1991.

\end{thebibliography}