@article{zhang2012unified,
  title={A unified active learning framework for biomedical relation extraction},
  author={Zhang, Hong-Tao and Huang, Min-Lie and Zhu, Xiao-Yan},
  journal={Journal of Computer Science and Technology},
  volume={27},
  number={6},
  pages={1302--1313},
  year={2012},
  publisher={Springer}
}