@book {9737,
	title = {Empire{\textquoteright}s Twilight: Northeast Asia under the Mongols},
	year = {2009},
	publisher = {Harvard University Press},
	organization = {Harvard University Press},
	address = {Cambridge, MA},
	url = {http://www.hup.harvard.edu/catalog.php?isbn=9780674036086},
	author = {David M. Robinson}
}
