Large-scale software engineering questions expert opinion or empirical evidence?

Barbara A. Kitchenham, David Budgen, Pearl Brereton, Mark Turner, Stuart M. Charters, Stephen G. Linkman. Large-scale software engineering questions expert opinion or empirical evidence?. IEE Proceedings - Software, 1(5):161-171, 2007. [doi]

@article{KitchenhamBBTCL07,
  title = {Large-scale software engineering questions expert opinion or empirical evidence?},
  author = {Barbara A. Kitchenham and David Budgen and Pearl Brereton and Mark Turner and Stuart M. Charters and Stephen G. Linkman},
  year = {2007},
  doi = {10.1049/iet-sen:20060052},
  url = {http://dx.doi.org/10.1049/iet-sen:20060052},
  tags = {empirical, software engineering},
  researchr = {https://researchr.org/publication/KitchenhamBBTCL07},
  cites = {0},
  citedby = {0},
  journal = {IEE Proceedings - Software},
  volume = {1},
  number = {5},
  pages = {161-171},
}