@inproceedings{van2013crowd,
  title = "The crowd keeps me in shape: social psychology and the present and future of health social machines",
  author = "Van Kleek and Max and Smith, Daniel A and Hall, Wendy and Shadbolt, Nigel",
  year = "2013",
  booktitle = "Proceedings of the 22nd International Conference on World Wide Web",
  organization = "ACM",
  pages = "927--932",
}