Pandey, Gajendra; Lambert, David L.; Jeffery, C. Simon; Rao, N. Kameswara (February 2006). "An Analysis of Ultraviolet Spectra of Extreme Helium Stars and New Clues to Their Origins". The Astrophysical Journal. 638 (1): 454–471. arXiv:astro-ph/0510161. Bibcode:2006ApJ...638..454P. doi:10.1086/498674. S2CID119359673.
Pandey, Gajendra; Lambert, David L.; Jeffery, C. Simon; Rao, N. Kameswara (February 2006). "An Analysis of Ultraviolet Spectra of Extreme Helium Stars and New Clues to Their Origins". The Astrophysical Journal. 638 (1): 454–471. arXiv:astro-ph/0510161. Bibcode:2006ApJ...638..454P. doi:10.1086/498674. S2CID119359673.
Jeffery, C. S.; Heber, U.; Hill, P. W.; Dreizler, S.; Drilling, J. S.; Lawson, W. A.; Leuenhagen, U.; Werner, K. (August 28 – September 1, 1995). "A catalogue of hydrogen-deficient stars". In Jeffery, C. S.; Heber, U. (eds.). Hydrogen deficient stars, Proceedings. Vol. 96. Bamberg, Germany: Astronomical Society of the Pacific Conference Series (published 1996). Bibcode:1996ASPC...96..471J.
Pandey, Gajendra; Lambert, David L.; Jeffery, C. Simon; Rao, N. Kameswara (February 2006). "An Analysis of Ultraviolet Spectra of Extreme Helium Stars and New Clues to Their Origins". The Astrophysical Journal. 638 (1): 454–471. arXiv:astro-ph/0510161. Bibcode:2006ApJ...638..454P. doi:10.1086/498674. S2CID119359673.
Pandey, Gajendra; Lambert, David L.; Jeffery, C. Simon; Rao, N. Kameswara (February 2006). "An Analysis of Ultraviolet Spectra of Extreme Helium Stars and New Clues to Their Origins". The Astrophysical Journal. 638 (1): 454–471. arXiv:astro-ph/0510161. Bibcode:2006ApJ...638..454P. doi:10.1086/498674. S2CID119359673.