@article{LaManna1989,
	title = {The case for permissive patents},
	author = {Manfredi La Manna and Ross Macleod and David de Meza},
	journal = {European Economic Review},
	month = {Sep},
	number = {7},
	pages = {1427--1443},
	url = {http://www.sciencedirect.com/science/article/B6V64-45F632F-66/1/f45b5b339e157450543b4553885e4e2f},
	volume = {33},
	year = {1989},
	biburl = {http://www.bibsonomy.org/bibtex/2ef2af3ac55523cfeba4291e38fc5f677/smicha},
	keywords = {imported }
}