@article {4641,
	title = {End stopping and length tuning in psychophysical spatial filters},
	journal = {Journal of the Optical Society of America A: Optics and Image Science, and Vision},
	year = {1997},
	pages = {2346-2354},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/9291605},
	author = {Cong Yu and Dennis M. Levi}
}
