Shetye, S.; Goriely, S.; Siess, L.; Van Eck, S.; Jorissen, A.; Van Winckel, H. (2019). "Observational evidence of third dredge-up occurrence in S-type stars with initial masses around 1 M☉". Astronomy and Astrophysics. 625: L1. arXiv:1904.04039. Bibcode:2019A&A...625L...1S. doi:10.1051/0004-6361/201935296.
Van Eck, S.; Jorissen, A. (1999). "The Henize sample of S stars. I. The technetium dichotomy". Astronomy and Astrophysics. 345: 127–136. arXiv:astro-ph/9903241. Bibcode:1999A&A...345..127V.
Jorissen, A.; Van Eck, S.; Mayor, M.; Udry, S. (1998). "Insights into the formation of barium and Tc-poor S stars from an extended sample of orbital elements". Astronomy and Astrophysics. 332: 877. arXiv:astro-ph/9801272. Bibcode:1998A&A...332..877J.
Van Eck, S.; Jorissen, A.; Udry, S.; Mayor, M.; Pernier, B. (1998). "The HIPPARCOS Hertzsprung-Russell diagram of S stars: Probing nucleosynthesis and dredge-up". Astronomy and Astrophysics. 329: 971. arXiv:astro-ph/9708006. Bibcode:1998A&A...329..971V.
Shetye, S.; Goriely, S.; Siess, L.; Van Eck, S.; Jorissen, A.; Van Winckel, H. (2019). "Observational evidence of third dredge-up occurrence in S-type stars with initial masses around 1 M☉". Astronomy and Astrophysics. 625: L1. arXiv:1904.04039. Bibcode:2019A&A...625L...1S. doi:10.1051/0004-6361/201935296.
MacConnell, D. J. (1979). "Discoveries on Southern Red-Sensitive Objective-Prism Plates – Part Two – New Ms-Stars Carbon-Stars and Sc-Stars". Astronomy and Astrophysics Supplement. 38: 335. Bibcode:1979A&AS...38..335M.
Boeshaar, P. C.; Keenan, P. C. (1979). "The problem of spectral classification of stars in the sequence S-SC-C". Spectral Classification of the Future. Ricerche Astronomiche. Vol. 9. p. 39. Bibcode:1979RA......9...39B.
Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009–2016)". VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014). 1. Bibcode:2014yCat....1.2023S.
Keenan, P. C.; McNeil, R. C. (1977). "An atlas of spectra of the cooler stars : Types G, K, M, S and C". Obs. 97: 178. Bibcode:1977Obs....97..178K.
Keenan, Ph. C. (1973). "The Role of Classification of Slit Spectrograms (introductory Lecture)". Spectral Classification and Multicolour Photometry. IAU Symposium. Vol. 50. p. 3. Bibcode:1973IAUS...50....3K.
Shetye, S.; Goriely, S.; Siess, L.; Van Eck, S.; Jorissen, A.; Van Winckel, H. (2019). "Observational evidence of third dredge-up occurrence in S-type stars with initial masses around 1 M☉". Astronomy and Astrophysics. 625: L1. arXiv:1904.04039. Bibcode:2019A&A...625L...1S. doi:10.1051/0004-6361/201935296.
Van Eck, S.; Jorissen, A. (1999). "The Henize sample of S stars. I. The technetium dichotomy". Astronomy and Astrophysics. 345: 127–136. arXiv:astro-ph/9903241. Bibcode:1999A&A...345..127V.
Jorissen, A.; Van Eck, S.; Mayor, M.; Udry, S. (1998). "Insights into the formation of barium and Tc-poor S stars from an extended sample of orbital elements". Astronomy and Astrophysics. 332: 877. arXiv:astro-ph/9801272. Bibcode:1998A&A...332..877J.
Groenewegen, M. A. T.; Van Den Hoek, L. B.; De Jong, T. (1995). "The evolution of galactic carbon stars". Astronomy and Astrophysics. 293: 381. Bibcode:1995A&A...293..381G.
Van Eck, S.; Jorissen, A.; Udry, S.; Mayor, M.; Pernier, B. (1998). "The HIPPARCOS Hertzsprung-Russell diagram of S stars: Probing nucleosynthesis and dredge-up". Astronomy and Astrophysics. 329: 971. arXiv:astro-ph/9708006. Bibcode:1998A&A...329..971V.
Ake, Thomas B.; Johnson, Hollis R.; Perry, Benjamin F. (1988). "Companions to peculiar red giants: HR 363 and HR 1105". In ESA. 281: 245. Bibcode:1988ESASP.281a.245A.
Stephenson, C. B. (1984). "A General Catalogue of Galactic S-Stars – ED.2". Publications of the Warner and Swasey Observatory. 3: 1. Bibcode:1984PW&SO...3....1S.
Sato, K.; Kuji, S. (1990). "MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington". Astronomy and Astrophysics Supplement Series. 85: 1069. Bibcode:1990A&AS...85.1069S.