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Publications in Math-Net.Ru |
Citations |
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2005 |
| 1. |
L. A. Cherkas, I. L. Shevtsov, “On the Coppel Problem for Quadratic Systems with a Fine Focus”, Differ. Uravn., 41:8 (2005), 1100–1104   ; Differ. Equ., 41:8 (2005), 1155–1159 |
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2004 |
| 2. |
L. A. Cherkas, I. L. Shevtsov, “Normal-Size Limit Cycles of Quadratic Systems with a Structurally Unstable Focus”, Differ. Uravn., 40:8 (2004), 1076–1084 ; Differ. Equ., 40:8 (2004), 1139–1148 |
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