| Original language | English |
|---|---|
| Pages (from-to) | L157-L161 |
| Journal | JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL |
| Volume | 14 |
| Publication status | Published - 1 Jan 1981 |
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Research output: Contribution to journal › Article › peer-review
| Original language | English |
|---|---|
| Pages (from-to) | L157-L161 |
| Journal | JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL |
| Volume | 14 |
| Publication status | Published - 1 Jan 1981 |