1. Reachability logic: an efficient fragment of transitive closure logic;Alechina;Logic J. IGPL,2000
2. F. Alkhateeb, Querying RDF(S) with regular expressions, Ph.D. Thesis, Université Joseph Fourier, Grenoble (FR), 2008.
3. Extending SPARQL with regular expression patterns (for querying RDF);Alkhateeb,2009
4. Constrained regular expressions in SPARQL;Alkhateeb,2008
5. Survey of graph database models;Angles;ACM Comput. Surv.,2008