R. Angles and C. Gutiérrez, Survey of graph database models, ACM Computing Surveys, vol.40, issue.1, 2008.
DOI : 10.1145/1322432.1322433

D. Borthakur, Petabyte scale databases and storage systems at Facebook, Proceedings of the 2013 international conference on Management of data, SIGMOD '13, pp.1267-1268, 2013.
DOI : 10.1145/2463676.2463713

A. Bozzon, M. Brambilla, and S. Ceri, Answering search queries with CrowdSearcher, Proceedings of the 21st international conference on World Wide Web, WWW '12, pp.1009-1018, 2012.
DOI : 10.1145/2187836.2187971

B. F. Cooper, Spanner, Proceedings of the 6th International Systems and Storage Conference on, SYSTOR '13, p.9, 2013.
DOI : 10.1145/2485732.2485756

R. , D. Virgilio, and A. Maccioni, Generation of reliable randomness via social phenomena, MEDI, pp.65-77, 2013.

R. D. Virgilio, A. Maccioni, and R. Torlone, Converting relational to graph databases, First International Workshop on Graph Data Management Experiences and Systems, GRADES '13, 2013.
DOI : 10.1145/2484425.2484426

G. Demartini, B. Trushkowsky, T. Kraska, and M. J. Franklin, Crowdq: Crowdsourced query understanding, CIDR, 2013.

M. Eysholdt and H. Behrens, Xtext, Proceedings of the ACM international conference companion on Object oriented programming systems languages and applications companion, SPLASH '10, pp.307-309, 2010.
DOI : 10.1145/1869542.1869625

M. J. Franklin, D. Kossmann, T. Kraska, S. Ramesh, and R. Xin, CrowdDB, Proceedings of the 2011 international conference on Management of data, SIGMOD '11, pp.61-72, 2011.
DOI : 10.1145/1989323.1989331

A. Marcus, E. Wu, D. Karger, S. Madden, and R. Miller, Human-powered sorts and joins, Proc. VLDB Endow, pp.13-24, 2011.
DOI : 10.14778/2047485.2047487
URL : http://arxiv.org/abs/1109.6881

H. Park, R. Pang, A. Parameswaran, H. Garcia-molina, N. Polyzotis et al., An overview of the deco system, ACM SIGMOD Record, vol.41, issue.4, pp.22-2748, 2008.
DOI : 10.1145/2430456.2430462

M. A. Rodriguez and P. Neubauer, Constructions from dots and lines. CoRR, abs, 1006.

P. J. Sadalage and M. Fowler, NoSQL distilled: a brief guide to the emerging world of polyglot persistence, 2012.

J. Selke, C. Lofi, and W. Balke, Pushing the boundaries of crowd-enabled databases with query-driven schema expansion, Proceedings of the VLDB Endowment, vol.5, issue.6, pp.538-549, 2012.
DOI : 10.14778/2168651.2168655

J. Wang, T. Kraska, M. J. Franklin, and J. Feng, CrowdER, Proceedings of the VLDB Endowment, vol.5, issue.11, pp.1483-1494, 2012.
DOI : 10.14778/2350229.2350263