Research output: Contribution to journal › Article › peer-review
| Original language | Russian |
|---|---|
| Pages (from-to) | 73 -77 |
| Journal | Вестник Ленинградского университета. Серия 1: Математика, механика, астрономия. |
| Issue number | 3 |
| State | Published - 1980 |
ID: 76588423