@article{10640,
  author = {Vigdis Kampenes and Tore Dyb{\r a} and Jo Hannay and Dag Sj{\o}berg},
  title = {A Systematic Review of Quasi-Experiments in Software Engineering},
  year = {2009},
  journal = {Information and Software Technology},
  volume = {51},
  number = {1},
  pages = {71-82},
  month = {January},
}