Journal of Vision. 2014; 14(13):16. https://doi.org/10.1167/14.13.16

Journal of Vision. 2007; 7(9):850. https://doi.org/10.1167/7.9.850

Journal of Vision. 2005; 5(8):715. https://doi.org/10.1167/5.8.715

Invest. Ophthalmol. Vis. Sci.. 1981; 21(6):877-879.

Invest. Ophthalmol. Vis. Sci.. 1980; 19(1):108-111.