@inproceedings {5149,
	title = {Approach Zero and Anserini at the CLEF-2021 ARQMath Track: Applying Substructure Search and BM25 on Operator Tree Path Tokens},
	booktitle = {Conference and Labs of the Evaluation Forum (CLEF)},
	year = {2021},
	url = {http://ceur-ws.org/Vol-2936/paper-09.pdf},
	author = {Wei Zhong and Xinyu Zhang and Ji Xin and Richard Zanibbi and Jimmy Lin}
}
