Research output: Contribution to journal › Article › peer-review
| Original language | English |
|---|---|
| Pages (from-to) | 632-635 |
| Number of pages | 4 |
| Journal | Mathematical Notes of the Academy of Sciences of the USSR |
| Volume | 48 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 1990 |
ID: 49227950