@inproceedings{holte2016bidirectional, title={Bidirectional Search That Is Guaranteed to Meet in the Middle.}, author={Holte, Robert C and Felner, Ariel and Sharon, Guni and Sturtevant, Nathan R}, booktitle={30th AAAI Conference on Artificial Intelligence (AAAI-16)}, pages={3411--3417}, year={2016} }