Research output: Contribution to journal › Article › peer-review
| Original language | Russian |
|---|---|
| Pages (from-to) | 27-32 |
| Journal | Вестник Ленинградского университета. Серия 1: Математика, механика, астрономия. |
| Issue number | 7 |
| State | Published - 1980 |
ID: 84381337