Constraints on the intrinsic charm content of the proton from recent ATLAS data V. A. Bednyakov, S. J. Brodsky, A. V. Lipatov, G. I. Lykasov, M. A. Malyshev, J. Smiesko and S. Tokar Eur. Phys. J. C, 79 2 (2019) 92 Published online: 30 January 2019 DOI: 10.1140/epjc/s10052-019-6605-y