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Eric E., Mamajek; Hillenbrand, Lynne A. (Aralık 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2). ss. 1264-1293. arXiv:0807.1686 $2. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
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Frasca, A.; Covino, E.; Spezzi, L.; Alcalá, J. M.; Marilli, E.; Fżrész, G.; Gandolfi, D. (Aralık 2009). "REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters". Astronomy and Astrophysics. 508 (3). ss. 1313-1330. Bibcode:2009A&A...508.1313F. doi:10.1051/0004-6361/200913327.
Eric E., Mamajek; Hillenbrand, Lynne A. (Aralık 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal. 687 (2). ss. 1264-1293. arXiv:0807.1686 $2. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.