CELEDON, M., CARBONELL, J., IBARRA, L. and PIZARRO, J. (1998) “Identification of bovine viral diarrhoea virus in persistently infected immunotolerant cows in herds of the Region Metropolitana, Chile”, Archivos de Medicina Veterinaria, 30(1), pp. 125–132. doi: 10.4067/S0301-732X1998000100014.