F. Alkhateeb, J. Baget, and J. Euzenat, Extending SPARQL with regular expression patterns (for querying RDF) Web Semantics: Science, Services and Agents on the World Wide Web, pp.57-73, 2009.

F. Alkhateeb and J. Euzenat, Constrained regular expressions for answering RDF-path queries modulo RDFS, International Journal of Web Information Systems, vol.10, issue.1, pp.24-50, 2014.
DOI : 10.1108/IJWIS-05-2013-0013

URL : https://hal.archives-ouvertes.fr/hal-00975283

K. Anyanwu, A. Maduko, and A. Sheth, SPARQ2L, Proceedings of the 16th international conference on World Wide Web , WWW '07, pp.797-806, 2007.
DOI : 10.1145/1242572.1242680

M. Arenas and J. Pérez, Querying semantic web data with SPARQL, Proceedings of the 30th symposium on Principles of database systems of data, PODS '11, pp.305-316, 2011.
DOI : 10.1145/1989284.1989312

P. Bosc and O. Pivert, SQLf Query Functionality on Top of a Regular Relational Database Management System, Knowl. Mgmt. in Fuzzy Databases, pp.171-190, 2000.
DOI : 10.1007/978-3-7908-1865-9_11

P. Bosc and O. Pivert, On four noncommutative fuzzy connectives and their axiomatization. Fuzzy Sets and Systems, pp.42-60, 2012.
URL : https://hal.archives-ouvertes.fr/hal-00736339

J. Cheng, Z. Ma, and L. Yan, f-SPARQL: A Flexible Extension of SPARQL, Proc. of the Intl. Conf. on Database and Expert Systems Applications (DEXA), pp.487-494, 2010.
DOI : 10.1007/978-3-642-15364-8_41

D. Dubois and H. Prade, Weighted minimum and maximum operations in fuzzy set theory, Information Sciences, vol.39, issue.2, pp.205-210, 1986.
DOI : 10.1016/0020-0255(86)90035-6

J. Fodor and R. Yager, Fuzzy-set theoretic operators and quantifiers The Handbooks of Fuzzy Sets Series: Fundamentals of Fuzzy Sets, pp.125-193, 2000.

S. Harris and A. Seaborne, SPARQL 1.1 Query Language, W3C Recommendation, 2013.

K. J. Kochut and M. Janik, SPARQLeR: Extended Sparql for Semantic Association Discovery, The Semantic Web: Research and Applications, pp.145-159, 2007.
DOI : 10.1007/978-3-540-72667-8_12

Y. Lv, Z. Ma, and L. Yan, Fuzzy RDF: A data model to represent fuzzy metadata, Fuzzy SystemsIEEE World Congress on Computational Intelligence). IEEE Intl. Conf. on, pp.1439-1445, 2008.

R. Ma, X. Jia, J. Cheng, and R. Angryk, SPARQL queries on RDF with fuzzy constraints and preferences, Journal of Intelligent & Fuzzy Systems, vol.30, issue.1, pp.1-13, 2015.
DOI : 10.3233/IFS-151745

M. Mazzieri and A. Dragoni, A Fuzzy Semantics for the Resource Description Framework, Uncertainty Reasoning for the Semantic Web I, pp.244-261, 2008.
DOI : 10.1007/3-540-48005-6_7

M. Mazzieri, A. F. Dragoni, and U. P. Marche, A fuzzy semantics for semantic web languages, Proc. of Workshop URSW at the Intl. Semantic Web Conf. (ISWC), pp.12-22, 2005.

J. Pérez, M. Arenas, and C. Gutierrez, Semantics and complexity of SPARQL, ACM Trans. Database Syst, vol.3416, issue.3, pp.1-1645, 2009.

J. Pérez, M. Arenas, and C. Gutierrez, nSPARQL: A navigational language for RDF???, Web Semantics: Science, Services and Agents on the World Wide Web, vol.8, issue.4, pp.255-270, 2010.
DOI : 10.1016/j.websem.2010.01.002

O. Pivert, O. Slama, and V. Thion, SPARQL extensions with preferences, Proceedings of the 31st Annual ACM Symposium on Applied Computing, SAC '16, 2016.
DOI : 10.1145/2851613.2851690

URL : https://hal.archives-ouvertes.fr/hal-01235190

O. Pivert, V. Thion, H. Jaudoin, and G. Smits, On a Fuzzy Algebra for Querying Graph Databases, 2014 IEEE 26th International Conference on Tools with Artificial Intelligence, pp.748-755, 2014.
DOI : 10.1109/ICTAI.2014.116

URL : https://hal.archives-ouvertes.fr/hal-01059991

E. Prud and A. Seaborne, SPARQL query language for RDF, W3C Recomm, 2008.

A. Rosenfeid, Fuzzy graphs, Proc. of the US?Japan Seminar on Fuzzy Sets and Their Applications, p.77, 2014.

U. Straccia, A Minimal Deductive System for General Fuzzy RDF, Proc of the Intl. Conf on Web Reasoning and Rule Systems (RR), pp.166-181, 2009.
DOI : 10.1007/978-3-642-05082-4_12

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=

O. Udrea, D. Recupero, and V. Subrahmanian, Annotated RDF, The Semantic Web: Research and Applications, pp.487-501, 2006.
DOI : 10.1007/11762256_36

H. Wang, Z. Ma, and J. Cheng, fp-Sparql: An RDF fuzzy retrieval mechanism supporting user preference, 2012 9th International Conference on Fuzzy Systems and Knowledge Discovery, pp.443-447, 2012.
DOI : 10.1109/FSKD.2012.6234114

A. Zimmermann, N. Lopes, A. Polleres, and U. Straccia, A general framework for representing, reasoning and querying with annotated Semantic Web data, Web Semantics: Science, Services and Agents on the World Wide Web, vol.11, pp.72-95, 2012.
DOI : 10.1016/j.websem.2011.08.006

URL : https://hal.archives-ouvertes.fr/hal-01240838