1. New Developments in Superplasticizers for Lightweight Concrete;Berra,1989
2. Normalweight and Total-Lightweight High Strength Concretes: A Comparative Experimental Study;Berra;Proc. 2nd Int. Symp. “Utilisation of High Strength Concrete”, Berkeley,1990
3. G.Baronio, M.Berra, L.Bertolini, T.Pastore, “Steel Corrosion Monitoring in Normal and Total-Lightweight Concretes Exposed to Chloride and Sulphate Solutions. Part II: Polarisation Resistance Measurements”, communicated to Cement and Concrete Research.