@phdthesis {PHD-199906-Massey,
   type = {Dissertation Defense},
   author = {Barton Christopher Massey},
   title = {Directions in Planning: Understanding the Flow of Time in Planning},
   school = {College of Arts and Sciences, University of Oregon},
   month = 6,
   year = 1999,
   note = {Available at \url{https://www.cs.uoregon.edu/Reports/PHD-199906-Massey.pdf}},
}