Costa Marrero, J., 		Suárez-Gómez, A., 		Saniger Blesa, J. M., AND 		Calderón-Piñar, F..
"Effect of Chrome (Cr) on the Electrical Properties in the PZT System Modified with Strontium and Chrome" <em>Revista Cubana de Física</em> [Online], Volume 23 Number 1 (1 July 2006)