Number | Date | Country | Kind |
---|---|---|---|
3408848 | Mar 1984 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4422905 | Becker et al. | Dec 1983 | |
4493753 | Becker | Jan 1985 |
Number | Date | Country |
---|---|---|
3039110 | May 1982 | DEX |
2414658 | Jan 1983 | DEX |
3150257 | Jun 1983 | DEX |
Entry |
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Michael Lampton, Spektrum der Wissenschaft [Science Spectrum] Jan. 1982, pp. 44-55. |