@book{101790,
	author = {Kagan, Donald},
	title = {Decline and fall of the Roman Empire: why did it collapse?},
	publisher = {Heath},
	year = {[c1962]},
	series = {Problems in European civilization},
	address = {Boston},
	note = {Second ed. published in 1978 under title: The end of the Roman Empire.}
}