@article {VokHig2004,
	title = {Opposition logic and neural network models in artificial grammar learning},
	journal = {Consciousness and cognition},
	volume = {13},
	number = {3},
	year = {2004},
	pages = {565{\textendash}578},
	publisher = {Academic Press},
	author = {Vokey, John R and Higham, Philip A}
}
