author        = "Li, C. and  de Grijs, R. and  Deng, L. and  Rubele, S. and
                        Wang, C. and  Bekki, K. and  Cioni, M.-R. L. and 
                       Clementini, G. and  Emerson, J. and  For, B.-Q. and 
                       Girardi, L. and  Groenewegen, M. A. T. and  Guandalini, R.
                       and  Gullieuszik, M. and  Marconi, M. and  Piatti, A. E.
                       and  Ripepi, V. and  van Loon, J. T.",
      title         = "{The VMC Survey. XI. Radial Stellar Population Gradients
                       in the Galactic Globular Cluster 47 Tucanae}",
      year          = "2014",