1. Decline of natural cytotoxicity of human lymphocytes following infection with human T-cell leukemia/lymphoma virus (HTLV)
2. E. Gehan (1965 ) A generalized Wilcoxon test for comparing arbitrarily singly-censored samples .Biometrika, 203 -223 .
3. S. Ikeda, S. Momita, K. Kinoshita, M. Ito, Y. Kusumoto, Y. Yamada, S. Kamihira, M. Tomonaga, and M. Ichimaru (1990 ) Follow up study of pre-ATL .Proceedings of the Japanese Cancer Association, p.117 (Japanese Journal of Cancer Research).