1. The size of rod signals;Alpern;J. Physiol. Lond.,1970
2. Signal gain at rod-bipolar synapses;Ashmore;Invest. Ophthal. Visual Sci.,1978
3. Dark and light adaptation: Psychophysics;Barlow,1972
4. The physical limits of visual discrimination;Barlow,1964
5. Increment thresholds at low intensities considered as signal-noise discriminations;Barlow;J. Physiol. Lond.,1957