Tokarnia, C. H.; Canella, C. F. C.; Guimarães, J. A.; Döbereiner, J. Copper and Cobalt Deficiencies in Cattle and Sheep in Northeastern and Northern Brazil. PAB 2014, 3 (1), 351-360. https://doi.org/10.1590/S1678-3921.pab1968.v3.17981.