Stability and Reversible Oxidation of Sub‐Nanometric Cu5 Metal Clusters: Integrated Experimental Study and Theoretical Modeling**. - Buceta, David; Huseyinova, Shahana; Cuerva, Miguel; Lozano, Héctor; Giovanetti, Lisandro J.; Ramallo‐López, José M.; López‐Caballero, Patricia; Zanchet, Alexandre; Mitrushchenkov, Alexander O.; Hauser, Andreas W.; Barone, Giampaolo; Huck‐Iriart, Cristián; et al. (Chemistry - A European Journal, 2023)