@techreport {TR-1986-016,
   type = {Technical Report},
   author = {Kenneth Blaha},
   title = {A Greedy Approach to a NP-hard Problem for Permutation Groups},
   institution = {University of Oregon, Computer and Information Sciences Department},
   number = TR-1986-016,
   month = 5,
   year = 1988,
   note = {Available at \url{https://www.cs.uoregon.edu/Reports/TR-1986-016.pdf}},
}