@inproceedings{NiessinkV98:0,
  title = {Two Case Studies in Measuring Software Maintenance Effort},
  author = {Frank Niessink and Hans van Vliet},
  year = {1998},
  url = {http://dlib.computer.org/conferen/icsm/8779/pdf/87790076.pdf},
  tags = {case study, maintenance},
  researchr = {https://researchr.org/publication/NiessinkV98%3A0},
  cites = {0},
  citedby = {0},
  pages = {76-85},
  booktitle = {ICSM},
}