@article{272,
  author = {Lei Zou and Yue Pang and Tamer Ozsu and Jiaqi Chen},
  title = {Efficient Execution of SPARQL Queries With OPTIONAL and UNION Expressions},
  year = {2023},
  journal = {ArXiv},
  volume = {abs/2303.13844},
  doi = {10.48550/arXiv.2303.13844},
}