#full 4D exploration
@article{santos2016lifelong,
	title={Lifelong Information-driven Exploration to Complete and Refine 4D Spatio-Temporal Maps},
	author={Santos, Joao Machado and Krajn{\' i}k, Tom{\' a}{\v s} and Pulido Fentanes, Jaime and Duckett, Tom},
	journal={Robotics and Automation Letters},
	year={2016},
	publisher={IEEE}
}