@misc{niu_kf_2022,
	title = {{KF} Design for the loosely {GNSS}/{INS} data fusion},
	url = {http://www.i2nav.com/ueditor/jsp/upload/file/20220419/1650373861305077302.pdf},
	publisher = {Integrated and Intelligent Navigation Group (i2Nav), Wuhan University},
	author = {Niu, Xiaoji and Chen, Qijin},
	date = {2022-04},
}

@article{niu_development_2014,
	title = {Development and evaluation of {GNSS}/{INS} data processing software for position and orientation systems},
	volume = {47},
	issn = {0039-6265, 1752-2706},
	url = {http://www.tandfonline.com/doi/full/10.1179/1752270614Y.0000000099},
	doi = {10.1179/1752270614Y.0000000099},
	pages = {87--98},
	number = {341},
	journaltitle = {Survey Review},
	shortjournal = {Survey Review},
	author = {Niu, X. and Zhang, Q. and Gong, L. and Liu, C. and Zhang, H. and Shi, C. and Wang, J. and Coleman, M.},
	urldate = {2022-10-17},
	date = {2014-04-21},
	langid = {english},
}