Barlow, R.B., Ireland, C.I., Kass, L., Vision in Limulus mating behavior, Biological Bulletin, 1981 161 339-340

Powers, M.K., Barlow, R.B., Circadian changes in visual sensitivity of Limulus: behavioral evidence, Biological Bulletin, 1981 161 350-351

Hubbard, Ruth. Retinene Isomerase, Journal of General Physiology, Vol 39, No. 6 pp.935-962

Wald, G., Human Vision and the Spectrum, Science, 1945, 101, 653

Wald, G., Life and Light, Scientific American, Oct. 1959, pp 92-108

Invertebrate Photoreceptors, A Comparative Analysis, Jerome J. Wolken, Academic Press, NY, 1971

Kimbel, R.L., Poincelot, R.P., Abrahamson, E.W., Chromophore Transfer from Lipid to Protein in Bovine Rhodopsin, Biochemistry 1970 9:8 1817

Westerman, L.A, Barlow, R.B, Ultraviolet responses of the Limulus median ocellus, Biological Bulletin General Scientific Meetings. 161:3 352-353

Barlow, R.B, Ireland, L.C., Cass, L., Viision in Limulus mating behavior, Biological Bulletin General Scientific Meetings. 161:3 339-340

Quigley, J.P., Corcoran, G., Armstrong, P.B., A Hemolytic Activity Secreted by the Endotoxin-Challenged Horseshoe Crab: A Novel Immune System Operating at the Surface of the Carapace. , Biological Bulletin, 193: 273 (October 1997)