共 17 条
- [1] Choi N. S., 1979, US, Patent No. [4138344, 4138344 USA]
- [2] Choi NS, 1978, Patent No. [4093709, US4093709]
- [3] CHOI NS, 1979, Patent No. 4180646
- [4] CHOI NS, 1978, Patent No. 4131648
- [8] HELLER J, 1985, METHOD ENZYMOL, V112, P422
- [9] HELLER J, 1983, CONTRACEPT DELIV SYS, V4, P43
- [10] Heller J, 1984, Crit Rev Ther Drug Carrier Syst, V1, P39