@conference{
	11311_713358,
	author = {Massari, Mauro and Topputo, Francesco and Mingotti, G.},
	title = {Alternative Hybrid Propulsion Transfers for Marco Polo NEOs Sample Return Mission},
	year = {2013},
	publisher = {Univelt},
	address = {San Diego, CA},
	booktitle = {Spaceflight Mechanics 2013},
	isbn = {978-0-87703-597-8},	
	pages = {3353--3367}
}