@book{21946,
	author = {Milani, Andrea, ed. and Valsecchi, G. B., ed.},
	title = {Near earth objects, our celestial neighbors: opportunity and risk                                                       },
	publisher = {Cambridge University Press                                  },
	year = {2007},
	series = {IAU symposium; no. 236},
	address = {Cambridge                                                   },
	url = {https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/issue/F1054105ED97AC7EDB4A38127B5DB8B4}
}