@Article{Levesque98,
  Title                    = {Foundations for a Calculus of Situations},
  Author                   = {Levesque, Hector and Pirri, Fiora and Reiter, Ray},
  Journal                  = {Electronic Transactions of AI (ETAI)},
  Year                     = {1998},
  Number                   = {3--4},
  Pages                    = {159--178},
  Volume                   = {2},

  Key                      = {CogRobo},
  Timestamp                = {2018.09.23},
  Url                      = {Levesque98.pdf}
}

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