Article{nokey,
	title = {The Regulation of Digital Content Contracts in the Optional Instrument of Contract Law},
	author = {Loos, M.B.M. and Mak, C. and Guibault, L. and Helberger, N.},
	url = {http://www.ivir.nl/publicaties/download/ERPL_2011_6.pdf},
	year = {0104},
	date = {2012-01-04},
	keywords = {Auteursrecht, Intellectuele eigendom},
}