Applebury, Antoch, Baxter et al.: "The murine cone photoreceptor: a single cone type expresses both S and M opsins with retinal spatial patterning." in: Neuron, Vol. 27, Issue 3, pp. 513-23, 2000 (PubMed).
Radlwimmer, Yokoyama: "Genetic analyses of the green visual pigments of rabbit (Oryctolagus cuniculus) and rat (Rattus norvegicus)." in: Gene, Vol. 218, Issue 1-2, pp. 103-9, 1998 (PubMed).
Yokoyama, Radlwimmer: "The "five-sites" rule and the evolution of red and green color vision in mammals." in: Molecular biology and evolution, Vol. 15, Issue 5, pp. 560-7, 1998 (PubMed).
Sun, Macke, Nathans: "Mechanisms of spectral tuning in the mouse green cone pigment." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 94, Issue 16, pp. 8860-5, 1997 (PubMed).