1. Aho, A., Sethi, R., Ullman, J.D.: Compilers: principles, techniques, and tools. Wesley Longman Publishing, Boston, MA, USA (1986)
2. Brantner, M., Kanne, C-C., Moerkotte, G.: Let a single FLWOR bloom. Technical report, University of Mannheim, TR-2007-007 (2007)
3. Bruno, N., Koudas, N., Srivastava, D.: Holistic twig joins: optimal XML pattern matching. In: SIGMOD, pp. 310–321 (2002)
4. Dayal, U.: Of nests and trees: A unified approach to processing queries that contain nested subqueries, aggregates, and quantifiers. In: Proc. VLDB, pp. 197–208 (1987)
5. Hidders, J., et al.: How to recognise different kinds of tree patterns from quite a long way away. In: Proc. PLAN-X (2007)