J. Vanderbeke, West, M. J., De Propris, R., Peng, E. W., Blakeslee, J. P., Jordán, A., Côté, P., Gregg, M., Ferrarese, L., Takamiya, M., and Baes, M.,
“G2C2 - I. Homogeneous photometry for Galactic globular clusters in SDSS passbands”,
\mnras, vol. 437, pp. 1725-1733, 2014.