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Publications in Math-Net.Ru |
Citations |
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1990 |
| 1. |
D. Bularas, N. I. Vulpe, K. S. Sibirskii, “The problem of the center “in the large” for a general quadratic
system”, Dokl. Akad. Nauk SSSR, 311:4 (1990), 777–780    ; Dokl. Math., 41:2 (1990), 287–290 |
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1989 |
| 2. |
Bularas Driss, N. I. Vulpe, K. S. Sibirskii, “Solution of a problem of the center “in the large” for a general quadratic differential system”, Differ. Uravn., 25:11 (1989), 1856–1862 ; Differ. Equ., 25:11 (1989), 1294–1299 |
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1978 |
| 3. |
Bularas Driss, M. N. Popa, “Concomitants of a system with quadratic nonlinearities”, Differ. Uravn., 14:5 (1978), 835–842 |
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