F. Schweizer, B. C. Whitmore, V. C. Rubin (1983). «Colliding and merging galaxies. II - S0 galaxies with polar rings». Astronomical Journal88: 909-925. Bibcode:1983AJ.....88..909S. doi:10.1086/113377.
B. C. Whitmore, D. B. McElroy, F. Schweizer (1987). «The shape of the dark halo in polar-ring galaxies». Astrophysical Journal314: 439-456. Bibcode:1987ApJ...314..439W. doi:10.1086/165077.
B. C. Whitmore, R. A. Lucas, D. B. McElroy, T. Y. Steiman-Cameron, P. D. Sackett, R. P. Olling (1990). «New observations and a photographic atlas of polar-ring galaxies». Astronomical Journal100: 1489-1522, 1721-1755. Bibcode:1990AJ....100.1489W. doi:10.1086/115614.
Varnas, S.R. Bertola, F., Galletta, G., Freeman, K.C., Carter, D. (1987). «NGC 5266 - an elliptical galaxy with a dust ring». Astrophysical Journal313: 69-88,. Bibcode:1987ApJ...313...69V. doi:10.1086/164949.
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F. Schweizer, B. C. Whitmore, V. C. Rubin (1983). «Colliding and merging galaxies. II - S0 galaxies with polar rings». Astronomical Journal88: 909-925. Bibcode:1983AJ.....88..909S. doi:10.1086/113377.
J. L. Sérsic (1967). «Southern Peculiar Galaxies III». Zeitschrift für Astrophysik67: 306-311. Bibcode:1967ZA.....67..306S.
B. C. Whitmore, D. B. McElroy, F. Schweizer (1987). «The shape of the dark halo in polar-ring galaxies». Astrophysical Journal314: 439-456. Bibcode:1987ApJ...314..439W. doi:10.1086/165077.
B. C. Whitmore, R. A. Lucas, D. B. McElroy, T. Y. Steiman-Cameron, P. D. Sackett, R. P. Olling (1990). «New observations and a photographic atlas of polar-ring galaxies». Astronomical Journal100: 1489-1522, 1721-1755. Bibcode:1990AJ....100.1489W. doi:10.1086/115614.