Cole-Kodikara, Elizabeth M.; et al. NGC 6709: A Faint Zero-Age Main Sequence Open Cluster. The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2–4, 2021. March 2021. Bibcode:2021csss.confE.175C. doi:10.5281/zenodo.4565515. 175.
Cole-Kodikara, Elizabeth M.; et al. NGC 6709: A Faint Zero-Age Main Sequence Open Cluster. The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5), virtually anywhere, March 2–4, 2021. March 2021. Bibcode:2021csss.confE.175C. doi:10.5281/zenodo.4565515. 175.