CAUTION: This entry is based on phototaxis, not actual MSP or gene cloning.
Aiken, R. B., & Hailman, J. P. (1978).
Positive phototaxis of the brine shrimp Artemia salina to monochromatic light.
Canadian Journal of Zoology, 56(4), 708-711.
Warrant E.J., Nilsson D.-E. (1998) Absorption of White Light in Photoreceptors. Vision Res., Vol. 38, No. 2, pp. 195-207. PII: S0042-6989(97)00151-X
Stavenga D., Smits R.P., Hoenders B.J. (1993) Simple Exponential Functions Describing the Absorbance Bands of Visual Pigment Spectra. Vision Res. 33(8) pp. 1011-1017. doi:10.1016/0042-6989(93)90237-Q