Anglada-Escudé, Guillem; 외. (2014), “Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf”, 《Monthly Notices of the Royal Astronomical Society: Letters》 443: L89–L93, arXiv:1406.0818, Bibcode:2014MNRAS.443L..89A, doi:10.1093/mnrasl/slu076
Guinan, Edward F.; Engle, Scott G.; Durbin, Allyn (April 2016), “Living with a Red Dwarf: Rotation and X-Ray and Ultraviolet Properties of the Halo Population Kapteyn's Star”, 《The Astrophysical Journal》 821 (2): 14, arXiv:1602.01912, Bibcode:2016ApJ...821...81G, doi:10.3847/0004-637X/821/2/81, 81.
Anglada-Escudé, Guillem; 외. (2014), “Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf”, 《Monthly Notices of the Royal Astronomical Society: Letters》 443: L89–L93, arXiv:1406.0818, Bibcode:2014MNRAS.443L..89A, doi:10.1093/mnrasl/slu076
Houdebine, E. R. (September 2010), “Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars”, 《Monthly Notices of the Royal Astronomical Society》 407 (3): 1657–1673, Bibcode:2010MNRAS.407.1657H, doi:10.1111/j.1365-2966.2010.16827.x
Guinan, Edward F.; Engle, Scott G.; Durbin, Allyn (April 2016), “Living with a Red Dwarf: Rotation and X-Ray and Ultraviolet Properties of the Halo Population Kapteyn's Star”, 《The Astrophysical Journal》 821 (2): 14, arXiv:1602.01912, Bibcode:2016ApJ...821...81G, doi:10.3847/0004-637X/821/2/81, 81.
Anglada-Escudé, Guillem; 외. (2014), “Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf”, 《Monthly Notices of the Royal Astronomical Society: Letters》 443: L89–L93, arXiv:1406.0818, Bibcode:2014MNRAS.443L..89A, doi:10.1093/mnrasl/slu076
Houdebine, E. R. (September 2010), “Observation and modelling of main-sequence star chromospheres - XIV. Rotation of dM1 stars”, 《Monthly Notices of the Royal Astronomical Society》 407 (3): 1657–1673, Bibcode:2010MNRAS.407.1657H, doi:10.1111/j.1365-2966.2010.16827.x
Guinan, Edward F.; Engle, Scott G.; Durbin, Allyn (April 2016), “Living with a Red Dwarf: Rotation and X-Ray and Ultraviolet Properties of the Halo Population Kapteyn's Star”, 《The Astrophysical Journal》 821 (2): 14, arXiv:1602.01912, Bibcode:2016ApJ...821...81G, doi:10.3847/0004-637X/821/2/81, 81.