D. Akehurst, P. Linington, and O. Patrascoiu, OCL 2.0 - Implementing the Standard for Multiple Metamodels, Proceedings of the UML'03 workshop, p.19, 2003.
DOI : 10.1016/j.entcs.2003.09.002

E. Balland and P. Brauner, Term-graph Rewriting in Tom Using Relative Positions, Electronic Notes in Theoretical Computer Science, vol.203, issue.1, p.317, 2008.
DOI : 10.1016/j.entcs.2008.03.030

URL : https://hal.archives-ouvertes.fr/inria-00129515

E. Balland, P. Brauner, R. Kopetz, P. Moreau, and A. Reilles, Tom: Piggybacking Rewriting on Java, RTA, pp.36-47, 2007.
DOI : 10.1007/978-3-540-73449-9_5

URL : https://hal.archives-ouvertes.fr/inria-00142045

M. Kay, XSLT 2.0 and XPath 2.0 Programmer's Reference (Programmer to Programmer), 2008.