Research output: Contribution to journal › Article › peer-review
| Original language | English |
|---|---|
| Pages (from-to) | 173-180 |
| Number of pages | 8 |
| Journal | Vestnik St. Petersburg University: Mathematics |
| Volume | 47 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2014 |
ID: 125704368