@book{31828,
	author = {Popkin, Richard H.},
	title = {The third force in seventeenth-century thought /},
	publisher = {E.J. Brill,},
	year = {1992.},
	series = {Brill's studies in intellectual history,},
	address = {Leiden ;},
	url = {http://dx.doi.org/10.1163/9789004246713}
}