RISC RISC Research Institute for Symbolic Computation  
  • @techreport{RISC1988,
    author = {S. Sakata},
    title = {{Degree of 2D Discrete Linear Shift-Invariant System and Reduction of 2D Rational Transfer Function}},
    number = {88-19},
    year = {1988},
    type = {RISC Report Series},
    institution = {Research Institute for Symbolic Computation (RISC), Johannes Kepler University Linz},
    address = {Schloss Hagenberg, 4232 Hagenberg, Austria}
    }