= пїЅпїЅпїЅпїЅпїЅпїЅ, пїЅпїЅпїЅпїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅпїЅ 6 6
| [книга] |
| Диференциални уравнения |
| |
| София : Тонко Тонков |
| 2000 |
ISBN: | 954-90588-1-6 |
| |
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