Comparison theorems for nonlinear ODE's
Jozef Džurina (1992)
Mathematica Slovaca
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Jozef Džurina (1992)
Mathematica Slovaca
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Christos G. Philos (1979)
Archivum Mathematicum
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N. Parhi, S. Panigrahi (2002)
Mathematica Slovaca
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