@article {DBLP:journals/ai/KoubarakisS00,
	title = {Querying temporal and spatial constraint networks in PTIME},
	journal = {Artif. Intell.},
	volume = {123},
	number = {1-2},
	year = {2000},
	pages = {223{\textendash}263},
	doi = {10.1016/S0004-3702(00)00055-2},
	url = {https://doi.org/10.1016/S0004-3702(00)00055-2},
	author = {Manolis Koubarakis and Spiros Skiadopoulos}
}
