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- [3] ASYMPTOTIC STABILITY OF X' = P(X,Y)X,Y' = Q(X,Y)YJOURNAL OF DIFFERENTIAL EQUATIONS, 1971, 9 (02) : 285 - &GRIMMER, RC
- [5] GEOMETRY OF DIFFERENTIAL EQUATION Y'''=G(X,Y,Y')Y'' + H (X,Y,Y')Y''(2)ATTI DELLA ACCADEMIA NAZIONALE DEI LINCEI RENDICONTI-CLASSE DI SCIENZE FISICHE-MATEMATICHE & NATURALI, 1969, 46 (05): : 535 - &BOMPIANI, E
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- [9] THE NUMBER OF LIMIT CYCLES OF THE DY/DX=Q(X,Y,Z)/P(X,Y,Z), DZ/DX=R(X,Y,Z)/P(X,Y,Z), SYSTEM WHERE P(X,Y,Z),Q(X,Y,Z),R(X,Y,Z) ARE 2ND DEGREE POLYNOMIALSDOKLADY AKADEMII NAUK SSSR, 1959, 128 (05): : 899 - 902KHUDAIVERENOV, MG
- [10] On the Polynomial Solutions of the Polynomial Differential Equations y y′ = a0(x) + a1(x) y + a2(x) y2 + … + an(x) ynIndian Journal of Pure and Applied Mathematics, 2020, 51 : 217 - 232Antoni FerragutJaume Llibre