Böttcher, Stefan: Proceedings / ICDT '90, Third International Conference on Database Theory, Paris, France, December 12 - 14, 1990 / Improving the concurrency of integrity checks and write operations. In: Proceedings / ICDT '90, Third International Conference on Database Theory, Paris, France, December 12 - 14, 1990. Jg.1990. 2009, S. 259-273