1. Ahmed, R., Salmi, A., Butler, L. D., Chiller, J. M., Oldstone, M. B. A.: Selection of genetic variants of lymphocytic choriomeningitis virus in spleens of persistently infected mice. J. Exp. Med.60, 521?540 (1984).
2. Coulombié, F. C., Laguens, R. M., Coto, C. E.: Administration of antithymocyte serum modifies the response ofCalomys musculinus to Junín virus infection. Intervirology (in press).
3. Damonte, E. B., Coto, C. E.: Temperature sensitivity of the arenavirus Junín isolated from persistently infected Vero cells. IntervirologyII, 282?287 (1979).
4. Guerrero, L. B. de, Weissenbacher, M., Parodi, A. S.: Inmunización contra la fiebre hemorrágica argentina con una cepa atenuada del virus Junín. Medicina (Buenos Aires)29, 1?5 (1969).
5. Holland, J., Spindler, K., Horodyski, F., Grabau, E., Nichol, S., Van de Pol, S.: Rapid evolution of RNA genomes. Science215, 1577?1585 (1982).