@techreport {TR-1991-002,
   type = {Technical Report},
   author = {Stephen Fickas, Rob Helm},
   title = {Acting Responsible: Reasoning about  Agents in a Multi-agent System },
   institution = {University of Oregon, Computer and Information Sciences Department},
   number = TR-1991-002,
   month = 1,
   year = 1991,
   note = {Available at \url{https://www.cs.uoregon.edu/Reports/TR-1991-002.pdf}},
}