Multi-wavelength characterisation of z ~ 2 clustered, dusty star-forming galaxies discovered by Planck
I. Flores-Cacho, D. Pierini, G. Soucail, L. Montier, H. Dole, E. Pointecouteau, R. Pelló, E. Le Floc’h, N. Nesvadba, G. Lagache, D. Guery and R. Cañameras