@article{wang2010hierarchical,
  title={A hierarchical connection graph algorithm for gable-roof detection in aerial image},
  author={Wang, Qiongchen and Jiang, Zhiguo and Yang, Junli and Zhao, Danpei and Shi, Zhenwei},
  journal={IEEE Geoscience and Remote Sensing Letters},
  volume={8},
  number={1},
  pages={177--181},
  year={2010},
  publisher={IEEE}
}