@phdthesis{UNY2168,
            year = {2011},
           month = {November},
          author = {- Rininda Ulfa Arizka},
           title = {Penerapan Sistem Kriptografi ElGamal atas Dalam Pembuatan Tanda Tangan Digital},
          school = {UNY},
             url = {http://eprints.uny.ac.id/2168/}
}