Can evidence for cosmological accretion be observed in the Hα emission from galaxies at z ~ 2?L. Le Tiran, M. D. Lehnert, P. Di Matteo, N. P. H. Nesvadba and W. van DrielA&A, 530 (2011) L6DOI: https://doi.org/10.1051/0004-6361/201116568