@techreport {TR-1993-012,
   type = {Technical Report},
   author = {E.Tick },
   title = {Proceedings of the Workshop on Practical Implementations and Systems Experience in Logic Programming},
   institution = {University of Oregon, Computer and Information Sciences Department},
   number = TR-1993-012,
   month = 6,
   year = 1993,
   note = {Available at \url{https://www.cs.uoregon.edu/Reports/TR-1993-012.pdf}},
}