@inproceedings{ijcai2009p194,
  title     = {Spectral Kernel Learning for Semi-Supervised Classification},
  author    = {Liu, Wei and Qian, Buyue and Cui, Jingyu and Liu, Jianzhuang},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1150--1154},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/194},
}