1. A. Albano, G. Ghelli, R. Orsini. A relationship mechanism for a strongly typed object-oriented database programming language. In Proceedings of the Seventeenth International Conference on Very Large Databases, pages 565–575, 1991.
2. M. Atkinson, R Richard, R Trinder. Bulk types for large scale programming. In Proceedings of the Kiev East/West Workshop on Next Generation Database Technology, volume 504 of Lecture Notes in Computer Science. Springer-Verlag, April 1991.
3. M.P. Atkinson P.J. Bailey D. Christie K.C.Ropper P.C.Philbrow Towards bulk type libraries for Napier88 FIDE Technical Report Series FIDE/93/78, FIDE Project Coordinator, Department of Computing Sciences, University of Glasgow Glasgow G128QQ 1993.
4. M.P.Atkinson P.W.Trinder D.A.Watt Bulk type constructors FIDE Technical Report Series FIDE/93/61, FIDE Project Coordinator, Department of Computing Sciences, University of Glasgow, Glasgow G128QQ1993.
5. F. Bancilhon, C. Delobel, P. Kanellakis. Building an Object-Oriented Database System: The Story of 02. Morgan Kaufmann Publishers, 1992.