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https://dl.acm.org/citation.cfm?id=2002937
https://dl.acm.org/citation.cfm?id=1985978
https://dl.acm.org/citation.cfm?id=1747538
https://dl.acm.org/citation.cfm?id=1831734
http://ieeexplore.ieee.org/document/7214294/