@article {4647,
	title = {Rectification nonlinearity in cortical end-stopped perceptive fields},
	journal = {Vision Research},
	year = {1998},
	pages = {3517-3530},
	doi = {10.1016/S0042-6989(98)00055-8},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/9893786},
	author = {Cong Yu and Dennis M. Levi}
}
