[Kalai. "Learning Nested Halfspaces and Uphill Decision Trees." Annual Conference on Computational Learning Theory, 2007.](https://mlanthology.org/colt/2007/kalai2007colt-learning/) doi:10.1007/978-3-540-72927-3_28
@inproceedings{kalai2007colt-learning,
title = {{Learning Nested Halfspaces and Uphill Decision Trees}},
author = {Kalai, Adam Tauman},
booktitle = {Annual Conference on Computational Learning Theory},
year = {2007},
pages = {378-392},
doi = {10.1007/978-3-540-72927-3_28},
url = {https://mlanthology.org/colt/2007/kalai2007colt-learning/}
}