Production of b and c hadrons with the ATLAS detector

A wide program of studies on heavy flavours is performed with the ATLAS detector. Production cross sections have been measured for hadrons with b and c quark, for quarkonia states, and for associated production J/psi+J/psi, J/psi+muon, J/psi+W and J/psi+Z. The talk will discuss recent results, including the prompt production of J/psi+J/psi pair (with the separation of single and double parton scattering components) and the kinematical correlation in B hadron pair production, studied through their inclusive decays to non-prompt J/psi and muons, respectively.