BibTex format
@inproceedings{Toni:2015,
author = {Toni, F and Gao, Y},
publisher = {AAAI Press/ International Joint Conference on Artificial Intelligence},
title = {Potential based reward shaping for hierarchical reinforcement learning},
url = {https://www.ijcai.org/Abstract/15/493},
year = {2015}
}