Hydrodynamic effects on the liquid-hexatic transition of active colloids G. Negro, C. B. Caporusso, P. Digregorio, G. Gonnella, A. Lamura and A. Suma Eur. Phys. J. E, 45 9 (2022) 75 Published online: 13 September 2022 DOI: 10.1140/epje/s10189-022-00230-1