Machinability optimization of dry CNC turning of UNIMAX® tool steel in annealed and hardened states by implementing swarm intelligence algorithms - N.A., Fountas; I., Papantoniou; D.E., Manolakos; J., Kechagias; N.M., Vaxevanidis (Annals of ”Dunarea de Jos” University of Galati, Fascicle V, Technologies in machine building, 2024)