TY - RPRT TI - Apparent contrast as a function of modulation depth and spatial frequency: a comparison between perceptual and electrophysiological measures. AU - O Franzén AU - M Berkley PY - 1975 DO - 10.1016/0042-6989(75)90280-1 UR - https://pubmed.ncbi.nlm.nih.gov/1138480/ ID - 1138480 ER -