Morgan, W.W.; Keenan, P.C. (1973), «Spectral Classification», Annual Review of Astronomy and Astrophysics11: 29, doi:10.1146/annurev.aa.11.090173.000333
McWilliam, Andrew (Δεκέμβριος 1990), «High-resolution spectroscopic survey of 671 GK giants», Astrophysical Journal Supplement Series74: 1075–1128, doi:10.1086/191527, ISSN0067-0049
Kashyap, V.; Rosner, R.; Harnden, F.R., Jr.; Maggio, A.; Micela, G.; Sciortino, S. (Αύγουστος 1994), «X-ray emission on hybird stars: ROSAT observations of alpha Trianguli Australis and IOTA Aurigae», The Astrophysical Journal431 (1): 402–415, doi:10.1086/174494
Strassmeier, K.G. (Ιανουάριος 2008), «Stellar Activity with BRITE: the ``Aurigae field», Communications in Asteroseismology152: 124–130, doi:10.1553/cia152s124
Hekker, S.; Snellen, I.A.G.; Aerts, C.; Quirrenbach, A.; Reffert, S.; Mitchell, D.S. (2008), «Precise radial velocities of giant stars. IV. A correlation between surface gravity and radial velocity variation and a statistical investigation of companion properties», Astronomy and Astrophysics480 (1): 215–222, doi:10.1051/0004-6361:20078321