Asplund, M. Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Marino, A. F., Milone, A. P., Renzini, A., Yong, D., Asplund, M., Costa, G. S. D., et al. (2021). Spectroscopy and photometry of the least massive Type II globular clusters: NGC 1261 and NGC 6934. The Astrophysical Journal, 923(1): 22. doi:10.3847/1538-4357/ac282c.