Approximate Hamiltonian for baryons in heavy-flavor QCD Kamil Serafin, María Gómez-Rocha, Jai More and Stanisław D. Głazek Eur. Phys. J. C, 78 11 (2018) 964 Published online: 22 November 2018 DOI: 10.1140/epjc/s10052-018-6436-2