Arellano Ferro, A., Bramich, D. M., Figuera Jaimes, R., Giridhar, S., Kains, N., Kuppuswamy, K., …Wertz, O. (2013). A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry★. Monthly Notices of the Royal Astronomical Society, 434(2), 1220-1238. https://doi.org/10.1093/mnras/stt1080