@article{Johnson05,
  title = {Association Implementation},
  author = {David Johnson},
  year = {2005},
  url = {http://www.jot.fm/issues/issue_2005_02/article1},
  researchr = {https://researchr.org/publication/Johnson05},
  cites = {0},
  citedby = {0},
  journal = {Journal of Object Technology},
  volume = {4},
  number = {2},
  pages = {81-108},
}