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Parsons، S. G.؛ Marsh، T. R.؛ Copperwheat، C. M.؛ Dhillon، V. S.؛ Littlefair، S. P.؛ Hickman، R. D. G.؛ Maxted، P. F. L.؛ Gänsicke، B. T.؛ Unda-Sanzana، E.؛ Colque، J. P.؛ Barraza، N.؛ Sánchez، N.؛ Monard، L. A. G. (2010). "Orbital period variations in eclipsing post-common-envelope binaries". Monthly Notices of the Royal Astronomical Society. ج. 407 ع. 4: 2362. arXiv:1005.3958. Bibcode:2010MNRAS.407.2362P. DOI:10.1111/j.1365-2966.2010.17063.x.
Applegate، James H. (1992). "A mechanism for orbital period modulation in close binaries". Astrophysical Journal, Part 1. ج. 385: 621–629. Bibcode:1992ApJ...385..621A. DOI:10.1086/170967.
Van Buren، D. (1986). "Comment on the three-body theory for period changes in RS CVn systems". The Astronomical Journal. ج. 92: 136–138. Bibcode:1986AJ.....92..136V. DOI:10.1086/114145.
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Marsh، T. R.؛ Pringle، J. E. (1990). "Changes in the orbital periods of close binary stars". Astrophysical Journal, Part 1. ج. 365: 677–680. Bibcode:1990ApJ...365..677M. DOI:10.1086/169521.
Frasca، A.؛ Lanza، A. F. (2005). "Orbital period variation in close binaries from radial velocity data and magnetic activity cycles". Astronomy and Astrophysics. ج. 429: 309. Bibcode:2005A&A...429..309F. DOI:10.1051/0004-6361:20041007.
Parsons، S. G.؛ Marsh، T. R.؛ Copperwheat، C. M.؛ Dhillon، V. S.؛ Littlefair، S. P.؛ Hickman، R. D. G.؛ Maxted، P. F. L.؛ Gänsicke، B. T.؛ Unda-Sanzana، E.؛ Colque، J. P.؛ Barraza، N.؛ Sánchez، N.؛ Monard، L. A. G. (2010). "Orbital period variations in eclipsing post-common-envelope binaries". Monthly Notices of the Royal Astronomical Society. ج. 407 ع. 4: 2362. arXiv:1005.3958. Bibcode:2010MNRAS.407.2362P. DOI:10.1111/j.1365-2966.2010.17063.x.