@article {gong2019mapping,
	title = {Mapping and Semantic Modeling of Underground Parking Lots Using a Backpack LiDAR System},
	journal = {IEEE Transactions on Intelligent Transportation Systems},
	year = {2019},
	publisher = {IEEE},
	author = {Gong, Zheng and Li, Jonathan and Luo, Zhipeng and Wen, Chenglu and Wang, Cheng and Zelek, John}
}
