Maximally entangled proton and charged hadron multiplicity in Deep Inelastic Scattering Martin Hentschinski, Krzysztof Kutak and Robert Straka Eur. Phys. J. C, 82 12 (2022) 1147 Published online: 19 December 2022 DOI: 10.1140/epjc/s10052-022-11122-1