@book{27118,
	author = {Polak, Emil J.},
	title = {Medieval and Renaissance letter treatises and form letters :},
	publisher = {Brill,},
	year = {2015.},
	series = {Crustaceana Monographs ;},
	address = {Leiden ;},
	url = {http://dx.doi.org/10.1163/9789004284678}
}