@ARTICLE{OKellyGibson06II,
  author = {O'Kelly, Jackie and Gibson, {J. Paul}},
  title = {RoboCode \& problem-based learning: a non-prescriptive approach to
	teaching programming},
  journal = {SIGCSE Bull.},
  year = {2006},
  volume = {38},
  pages = {217--221},
  number = {3},
  address = {New York, NY, USA},
  doi = {10.1145/1140123.1140182},
  issn = {0097-8418},
  publisher = {ACM}
}