@techreport{
  1998-TR4CBL-09-Ghosh,
  author = "D. Ghosh and F. Brglez",
  title  = "{Circuit Equivalence Classes and Design of Experiments for
  Performance Evaluation of Algorithms in Physical Design}",
  institution = "{CBL, CS Dept., NCSU, Box 7550, Raleigh, NC 27695}",
  number = "1998-TR4CBL-09-Ghosh",
  month  = "Sep",
  year   = "1998",
  note   = "{Also available at http://\-www.cbl.ncsu.edu/\-publications}"
}