J.K.J.K.BowmakerJ.K.J.K., H.J.H.J.DartnallH.J.H.J., Visual pigments of rods and cones in a human retina., „The Journal of Physiology”, 298 (1), 1980, s. 501–511, DOI: 10.1113/jphysiol.1980.sp013097, PMID: 7359434, PMCID: PMC1279132(ang.).
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J.K.J.K.BowmakerJ.K.J.K., H.J.H.J.DartnallH.J.H.J., Visual pigments of rods and cones in a human retina., „The Journal of Physiology”, 298 (1), 1980, s. 501–511, DOI: 10.1113/jphysiol.1980.sp013097, PMID: 7359434, PMCID: PMC1279132(ang.).