Barbuy, B., Chiappini, C., Cantelli, E., Depagne, E., Pignatari, M., Hirschi, R., Cescutti, G., Ortolani, S., Hill, V., Zoccali, M., Minniti, D., Trevisan, M., Bica, E., Gómez, A., "High-resolution abundance analysis of red giants in the globular cluster NGC 6522", Astronomy and Astrophysics, 2014