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- [2] EQUATION PHI(Z)=PHI1(X)+PHI2(Y)+PHI3(X+Y) [J]. DOKLADY AKADEMII NAUK SSSR, 1973, 210 (04): : 753 - 755
- [8] SOLUTIONS OF PHI(X)=N, WHERE PHI IS EULERS PHI-FUNCTION [J]. AMERICAN MATHEMATICAL MONTHLY, 1970, 77 (03): : 287 - &
- [9] ASYMPTOTICS OF SOLUTIONS OF THE EQUATION Y''=F(G(X))PHI(PSI(Y)) [J]. DIFFERENTIAL EQUATIONS //: PROCEEDINGS OF THE EQUADIFF CONFERENCE, 1989, 118 : 459 - 466
- [10] SOLUTIONS TO EQUATION PHI (N)= PHI(N+1) [J]. NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 20 (03): : A319 - A319