1. Lenkei, R., Mota, G., Dan, M.E., and Laky, M., Revue roum. Biochim.11 (1974) 271.
2. Lenkei, R., and Ghetie, V., J. immun. Meth.16 (1977) 23.
3. Lenkei, R., Revue roum. Med.18 (1980) 129.
4. Lenkei, R., Buligescu, L., Belascu, I., Pospai, D., and Dobre, I., Clin. exp. Immun.43 (1981) 381.
5. Thung, S.N., and Gerber, M.A., Gastroenterology80 (1981) 260.