RISC RISC Research Institute for Symbolic Computation  
  • @techreport{RISC1343,
    author = {Petr Lisonek},
    title = {{On a Conjecture of Graffiti}},
    number = {92-67},
    year = {1992},
    sponsor = { Austrian Science Foundation (FWF) project no. P7220, Austrian Ministery of Science and Research},
    type = {RISC Report Series},
    institution = {Research Institute for Symbolic Computation (RISC), Johannes Kepler University Linz},
    address = {Schloss Hagenberg, 4232 Hagenberg, Austria}
    }