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- [23] EQUATION F(F(X,Y), F(Z,Y)) =F(X,Z) NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1974, 21 (01): : A153 - A153
- [24] A RUNGE-KUTTAMETHOD FOR NUMERICAL INTEGRATION OF DIFFERENTIAL EQUATION Y''=F(X Y) ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 1965, 45 (05): : 354 - &
- [26] 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 - &
- [30] On the functional equation f(x plus y) = f(x) plus f(y) MONATSHEFTE FUR MATHEMATIK, 2020, 191 (03): : 635 - 637