Moroz, Irene M. Bifurcations in a class of complex differential equations. (English) Zbl 0763.34029 Eur. J. Appl. Math. 3, No. 3, 273-282 (1992). Reviewer: P.F.Moson (Budapest) MSC: 34C23 34M99 × Cite Format Result Cite Review PDF Full Text: DOI
Feng, Zhengyuan Direct grey model. (Chinese. English summary) Zbl 0759.93002 Acta Math. Appl. Sin. 15, No. 3, 345-354 (1992). MSC: 93A10 × Cite Format Result Cite Review PDF