Physical properties of z ~ 4 LBGs: differences between galaxies with and without Lyα emissionL. Pentericci, A. Grazian, A. Fontana, S. Salimbeni, P. Santini, C. De Santis, S. Gallozzi and E. GiallongoA&A, 471 2 (2007) 433-438DOI: https://doi.org/10.1051/0004-6361:20066933