@unpublished{SchwarzMattern1999,
  author  = {Reinhard Schwarz and Friedemann Mattern},
  title   = {Detecting Causal Relationships in Distributed Computations: In Search of the Holy Grail1},
  institution = {Fachbereich Informatik},
  year    = {1999},
  url  = {http://nbn-resolving.de/urn:nbn:de:hbz:386-kluedo-4006},
}