Cryptology ePrint Archive: BibTeX Citation of Report 2015/820

    author       = {Junqing Gong and
		    Jie Chen and
		    Xiaolei Dong and
		    Zhenfu Cao and
		    Shaohua Tang},
    title        = {Extended Nested Dual System Groups, Revisited},
    howpublished = {Cryptology ePrint Archive, Report 2015/820},
    year         = {2015},
    note         = {\url{}},

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.

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