@article{safesea2,
  title = "An exploration of the features of graded student essays using domain-independent natural language processing techniques",
  author = "Field, Debora; Richardson, John T. E.; Pulman, Stephen; Van Labeke, Nicolas and Whitelock, Denise",
  year = "2014",
  journal = "International Journal of e-Assessment",
  number = "1",
  pages = "article no. 69.",
  volume = "4",
}