@techreport {TR-1993-020,
   type = {Technical Report},
   author = {Christopher Hundhausen, Allen Maloney },
   title = {Object View: A Software Design Architecture for Breakpoint-Based Program Visualization},
   institution = {University of Oregon, Computer and Information Sciences Department},
   number = TR-1993-020,
   month = 9,
   year = 1993,
   note = {Available at \url{https://www.cs.uoregon.edu/Reports/TR-1993-020.pdf}},
}