@article{202104.0199,
	doi = {10.20944/preprints202104.0199.v1},
	url = {https://doi.org/10.20944/preprints202104.0199.v1},
	year = 2021,
	month = {April},
	publisher = {Preprints},
	author = {Waqas Ali and Muhammad Saleem and Yao Bin and Aidan Hogan and A.-C. Ngonga Ngomo},
	title = {A Survey of RDF Stores & SPARQL Engines for Querying Knowledge Graphs},
	journal = {Preprints}
}