1. Ciongoli, A. K., Platz, P., Dupont, B., Svejgaard, A., Fog, T., Jersild, C.: Lack of antigen response to myxoviruses in multiple sclerosis. Lancet1973 II, 1147
2. Croce, C. M., Sawicki, W., Kritchevsky, D., Koprowski, H.: Induction of homokaryocate, heterokaryocate and hybrid formation by lysolecithin. Exp. Cell Res.67, 427?435 (1971)
3. Dubois-Dalcq, M., Schumacher, G., Sever, J. L.: Acute multiple sclerosis: electron microscopic evidence for and against a viral agent in the plaques. Lancet1973 II, 1408?1411
4. Fujii, R., Minamiya, M., Kitayama, T., Nagamatsu, J.: Studies on HVJ pneumonitis among children. Rinsho-no-Nihon2, 878?881 (1956)
5. Hayflick, L., Moorhead, P. S.: The serial cultivation of human diploid cell strains. Exp. Cell Res.25, 585?621 (1961)