Evidence for PopIII-like stellar populations in the most luminous Ly;1 emitters at the epoch of reionisation: Spectroscopic confirmation
D. Sobral, J.J. Matthee, B. Darvish, D. Schaerer, B. Mobasher, H. Röttgering, S. Santos, S. Hemmati, The Astrophysical Journal 808 (2015) 139.