Discovery of technetium- and niobium-rich S stars: The case for bitrinsic starsS. Shetye, S. Van Eck, S. Goriely, L. Siess, A. Jorissen, A. Escorza and H. Van WinckelA&A, 635 (2020) L6DOI: https://doi.org/10.1051/0004-6361/202037481
