@techreport{becker_derivational_1992,
	address = {Pennsylvania, PA},
	title = {The {Derivational} {Generative} {Power} of {Formal} {Systems}, or {Scrambling} is {Beyond} {LCFRS}},
	institution = {Institute for Research in Cognitive Science, University of Pennsylvania},
	author = {Becker, Tilman and Rambow, Owen and Niv, Michael},
	year = {1992}
}