@article{Samuelson2006,
	title = {Testing to confirm that Leontief-Sraffa matrix equations for input/output must obey constancy of returns to scale},
	author = {Paul A. Samuelson and Erkko M. Etula},
	journal = {Economics Letters},
	month = {Feb},
	number = {2},
	pages = {183--188},
	url = {http://www.sciencedirect.com/science/article/B6V84-4HX478Y-1/2/5212e93f62f49c41b7084556629eff14},
	volume = {90},
	year = {2006},
	biburl = {http://www.bibsonomy.org/bibtex/2e6321f36553abe86fc4796fdc33e5bc4/smicha},
	description = {Economics Letters},
	keywords = {Sraffian commodity standard }
}