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Kemp, James C.; Wolstencroft (1972). “Interstellar Circular Polarization: Data for Six Stars and the Wavelength Dependence”. Astrophysical Journal176: L115. Bibcode: 1972ApJ...176L.115K. doi:10.1086/181036.
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Bastein, Pierre; Robert and Nadeau (1989). “Circular polarization in T Tauri stars. II - New observations and evidence for multiple scattering”. Astrophysical Journal339: 1089. Bibcode: 1989ApJ...339.1089B. doi:10.1086/167363.
Kemp, J. C. (1987). “The optical polarization of the Sun measured at a sensitivity of parts in ten million”. Nature326 (6110): 270–273. Bibcode: 1987Natur.326..270K. doi:10.1038/326270a0.
Kemp, James C.; Wolstencroft (1972). “Interstellar Circular Polarization: Data for Six Stars and the Wavelength Dependence”. Astrophysical Journal176: L115. Bibcode: 1972ApJ...176L.115K. doi:10.1086/181036.
Martin, P.G.; Illing, R.; Angel, J. R. P. (1972). “Discovery of interstellar circular polarization in the direction of the Crab nebula”. MNRAS159 (2): 191–201. Bibcode: 1972MNRAS.159..191M. doi:10.1093/mnras/159.2.191.
Bastein, Pierre; Robert and Nadeau (1989). “Circular polarization in T Tauri stars. II - New observations and evidence for multiple scattering”. Astrophysical Journal339: 1089. Bibcode: 1989ApJ...339.1089B. doi:10.1086/167363.