@InProceedings{ VasconcelosCunhaSilvestreOliveira:CDC:07,
	title = {{Landmark Based Nonlinear Observer for Rigid Body Attitude and Position Estimation}},
	booktitle = {Proceedings of the 46th IEEE Conference on Decision and Control (CDC2007)},
	author = {J.F. Vasconcelos and R. Cunha and C. Silvestre and P. Oliveira},
	location = {New Orleans, LA, USA},
	month = {December},
	year = {2007}
}