@article {9,
	title = {A Geometric Approach to Strapdown Magnetometer Calibration in Sensor Frame},
	journal = {IEEE Transactions on Aerospace Electronic Systems},
	year = {2010},
	author = {Jos{\'e} Vasconcelos and Gabriel H Elkaim and Carlos Silvestre and P Oliveira and Bruno Cardeira}
}
@conference {44,
	title = {A Geometric Approach to Strapdown Magnetometer Calibration in Sensor Frame},
	booktitle = {IFAC Workshop on Navigation, Guidance, and Control of Underwater Vehicles, IFAC NGCUV 2008},
	year = {2008},
	address = {Killaloe, Ireland},
	author = {Jos{\'e} Vasconcelos and Gabriel H Elkaim and Carlos Silvestre and P Oliveira and Bruno Cardeira}
}
@inbook {23,
	title = {Global Navigation Satellite System},
	booktitle = {Encyclopedia of Space Science and Technology},
	year = {2003},
	publisher = {Wiley and Sons},
	organization = {Wiley and Sons},
	chapter = {730-759},
	author = {B W Parkinson and J J Spilker and Gabriel H Elkaim}
}
