@article{Jacobs1999,
  author    = {Jacobs, Stephan},
  title     = {Introducing Measurable Requirements: A Case Study},
  series = {Proceedings : June 7 - 11, 1999, University of Limerick, Limerick, Ireland / sponsored by IEEE Computer Society Technical Council on Software Engineering. In cooperation with ACM SIGSOFT},
  journal   = {Proceedings : June 7 - 11, 1999, University of Limerick, Limerick, Ireland / sponsored by IEEE Computer Society Technical Council on Software Engineering. In cooperation with ACM SIGSOFT},
  isbn      = {0769501885},
  year      = {1999},
  language  = {en}
}
@article{Jacobs1999,
  author    = {Jacobs, Stephan},
  title     = {The Teamwork Approach in Requirements Engineering},
  series = {The nature of requirements engineering / Matthias Jarke ... (Hrsg.)},
  journal   = {The nature of requirements engineering / Matthias Jarke ... (Hrsg.)},
  publisher = {Shaker},
  address   = {Aachen},
  isbn      = {3-8265-6174-0},
  pages     = {XVIII, 410 S. : Ill., graph. Darst.},
  year      = {1999},
  language  = {en}
}