1. M. Milone eE. Borello:XVI Congresso Internazionale di Chimica pura ed applicata, Zurigo, 1955.
2. Gazz. Chim. It.,50–70 (1920–1940).
3. L. L. Merritt eE. Lanterman:Acta Crystall.,5, 811 (1952).
4. E. Borello eL. Henry:Compt. Rend.,241, 1280 (1955).
5. E. Borello eM. Colombo:Ric. Scient.,25, 2899 (1955).