Cryptology ePrint Archive: BibTeX Citation of Report 2002/050

    author       = {Jaume Martí-Farré and
		    Carles Padró},
    title        = {Secret sharing schemes with three or four minimal qualified subsets},
    howpublished = {Cryptology ePrint Archive, Report 2002/050},
    year         = {2002},
    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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