Y. Sficas

发表

Stable steady state of some population models

G. Karakostas, C. Philos, Y. Sficas, 1992 .

Existence Results for Initial Value Problems for Neutral Functional Differential Equations

S. Ntouyas, Y. Sficas, P. Tsamatos, 1994 .

Necessary and sufficient conditions for oscillations of neutral differential equations

Ioannis P. Stavroulakis, Y. G. Sficas, Y. Sficas, 1987 .

The effect of retarded actions on nonlinear oscillations

Y. Sficas, V. A. Staïkos, 1974 .

Global attractivity in a nonlinear difference equation

C. Philos, Y. Sficas, I. Purnaras, 1994 .

Behavior of solutions of differential equations with deviating argument

Y. Sficas, M. Grammatikópoulos, 1985 .

On the behavior of nonoscillatory solutions of differential equations with deviating argument

Y. Sficas, 1979 .

Oscillations of second order linear delay differential equations

Y. Sficas, G. Ladas, M.R.S. Kulenvić, 1988 .

Necessary and Sufficient Conditions for Oscillations

Y. Sficas, I. Stavroulakis, G. Ladas, 1983 .

Oscillation Criteria for First‐Order Delay Equations

Y. Sficas, I. Stavroulakis, 2003 .

On the existence of positive solutions of integrodifferential equations

C. Philos, Y. Sficas, 1990 .

On the oscillatory and asymptotic behavior of damped differential equations with retarded argument

Y. Sficas, 1976 .

Oscillatory and Asymptotic Characterization of the Solutions of Differential Equations with Deviating Arguments

V. A. Staikos, Y. Sficas, 1975 .

Oscillatory properties of strongly superlinear differential equations with deviating arguments

V. A. Staikos, Y. Sficas, M. Grammatikópoulos, 1979 .

Positive solutions of difference equations

C. Philos, Y. Sficas, 1990 .

Oscillatory and asymptotic behavior of second and third order retarded differential equations

C. Philos, Y. Sficas, 1982 .

Forced oscillations for differential equations of arbitrary order

V. A. Staikos, Y. Sficas, 1975 .

The effect of the delay on the oscillatory and asymptotic behavior of nth order retarded differential equations

Y. Sficas, 1975 .

Oscillations of retarded differential equations

V. A. Staikos, Y. Sficas, 1974, Mathematical Proceedings of the Cambridge Philosophical Society.

Oscillatory and asymptotic behavior of functional differential equations

V. A. Staikos, Y. Sficas, 1972 .

Oscillations of Second Order Neutral Equations

Y. Sficas, G. Ladas, E. Partheniadis, 1988, Canadian Journal of Mathematics.

On oscillations of some retarded differential equations

Y. Sficas, G. Ladas, O. Arino, 1987 .

Comparison results for oscillations of delay equations

Y. Sficas, G. Ladas, M. Kulenovic, 1990 .

Necessary and sufficient conditions for oscillation of delay equations with constant coefficients

Y. Sficas, G. Ladas, M. Grammatikópoulos, 1987 .

Some results on the asymptotic behavior of nonoscillatory solutions of differential equations with deviating arguments

V. A. Staikos, C. Philos, Y. Sficas, 1982, Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics.

A boundary value problem for n-th order functional differential equations

S. Ntouyas, Y. Sficas, 1981 .

Sharp conditions for the oscillation of delay difference equations

C. Philos, Y. Sficas, G. Ladas, 1989 .

Nonoscillatory functional-differential equations

Ioannis P. Stavroulakis, Y. G. Sficas, Y. Sficas, 1984 .

Oscillations in Higher-Order Neutral Differential Equations

C. Philos, Y. Sficas, I. Purnaras, 1993, Canadian Journal of Mathematics.

On the oscillation of neutral differential equations

C. Philos, Y. Sficas, 1992 .

On the nature of the nonoscillatory solutions of a class of neutral delay differential equations

C. Philos, Y. Sficas, 1991 .

Necessary and sufficient conditions for oscillations of neutral equations with several coefficients

Y. Sficas, I. Stavroulakis, M. Grammatikópoulos, 1988 .

Oscilations of higher-order neutral equations

Y. G. Sficas, Y. Sficas, Gerasimos Ladas, 1986, The Journal of the Australian Mathematical Society. Series B. Applied Mathematics.

Asymptotic behavior of the oscillatory solutions to first order non-autonomous linear neutral delay differential equations of unstable type

Christos G. Philos, I. K. Purnaras, Y. G. Sficas, 2007, Math. Comput. Model..

Asymptotic Decay of the Oscillatory Solutions to First Order Non-Autonomous Linear Unstable Type Delay Differential Equations

C. Philos, Y. Sficas, I. Purnaras, 2006 .

Asymptotic behavior of Caratheodory systems. Anti-Lyapunov method

V. A. Staikos, Y. Sficas, P. Palamides, 1980 .

Oscillations of differential equations with retardations

Y. Sficas, V. A. S. ikos, 1974 .

Asymptotic and oscillatory criteria for retarded differential equations

V. A. Staikos, Y. Sficas, M. Grammatikópoulos, 1978 .

On the Types of Nonoscillatory Solutions of Differential Equations with Deviating Arguments

V. A. Staikos, Y. Sficas, M. Grammatikópoulos, 1977 .

Oscillatory and asymptotic properties of differential equations with retarded arguments

V. A. Staikos, Y. Sficas, 1975 .

Necessary and Sufficient Conditions for Oscillations of Higher Order Delay Differential Equations

Ioannis P. Stavroulakis, Y. G. Sficas, Y. Sficas, 1984 .

Oscillation criteria for delay equations

Ioannis P. Stavroulakis, Mark Kon, Y. G. Sficas, 2000 .

Global attractivity in population dynamics

Mustafa R. S. Kulenovic, Y. G. Sficas, Y. Sficas, 1989 .

Oscillations of Neutral Delay Differential Equations

Y. Sficas, G. Ladas, 1986, Canadian Mathematical Bulletin.

Asymptotic behavior of oscillatory solutions

Y. G. Sficas, Y. Sficas, G. Ladas, 1988 .

Boundary Value Problems for Functional Differential Equations

S. Ntouyas, Y. Sficas, P. Tsamatos, 1996 .

An existence principle for boundary value problems for second order functional differential equations

S. Ntouyas, Y. Sficas, P. Tsamatos, 1993 .

Stability of Delay Differential Equations with Amnesia and a Sign-Guiding Factor☆

G. Karakostas, Y. Sficas, 1998 .