Number | Name | Date | Kind |
---|---|---|---|
3597421 | Webber | Aug 1971 | |
4399131 | Durckheimer et al. | Aug 1983 |
Entry |
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W. Durckheimer et al., in G. I. Gregory, Ed., Royal Society of Chemistry, Special Publication No. 38-Recent Advances in the Chemistry of .beta.-Lactam Antibiotics, London, Chapter 4, pp. 46-51, (1981). |