Research output: Contribution to journal › Article › peer-review
| Original language | English |
|---|---|
| Pages (from-to) | 355-357 |
| Number of pages | 3 |
| Journal | Mathematical Notes of the Academy of Sciences of the USSR |
| Volume | 1 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1967 |
ID: 73932132