https://www.aanda.org/articles/aa/abs/2021/05/aa40055e-20/aa40055e-20.html
Astronomy & Astrophysics (A&A) is an international journal which publishes papers on all aspects of astronomy and astrophysics
probingcoreovershootingusingsubgiant
https://www.arxiv.org/abs/astro-ph/0604453
Abstract page for arXiv paper astro-ph/0604453: Solar-like oscillations in the metal-poor subgiant nu Indi: constraining the mass and age using asteroseismology
astrophsolarlikeoscillations