@inproceedings{IJCAI:2018:Wan,<br>
  author =       {Yuanyu Wan and Nan Wei and Lijun Zhang},<br>
  title =        {Efficient Adaptive Online Learning via Frequent Directions},<br>
  booktitle =    {Proceedings of the 27th International Joint Conference on Artificial Intelligence (IJCAI)},<br>
  year =         {2018},<br>
  pages =        {2748--2754},<br>
}