OOIR: Observatory of International Research

Papers

(The TQCC of Electronic Journal of Qualitative Theory of Differential Equations is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-08-01 to 2025-08-01.)

Article	Citations
Ground states solutions for some non-autonomous Schrödinger-Bopp-Podolsky system	10
Biharmonic system with Hartree-type critical nonlinearity	6
Multiplicity of solutions for p ( x 5
Two regularity criteria of the 3D magneto-micropolar equations in Vishik spaces	4
Expansion of positivity to a class of doubly nonlinear parabolic equations	3
Critical points of locally Lipschitz functionals inside and outside the ordered interval	3
Sharp results for oscillation of second-order neutral delay differential equations	3
Positive solutions to three classes of non-local fourth-order problems with derivative-dependent nonlinearities	2
Strong maximum principle for a sublinear elliptic problem at resonance	2
Normalized solutions for a fractional coupled critical Hartree system	2
Bifurcations and Turing patterns in a diffusive Gierer–Meinhardt model	2
On the localization and numerical computation of positive radial solutions for ϕ -Laplace equations in t	2
Semilinear heat equation with singular terms	2
On a Dirichlet boundary value problem for an Ermakov–Painlevé I equation. A Hamiltonian EPI system	2
Homoclinic solutions for a class of asymptotically autonomous Hamiltonian systems with indefinite sign nonlinearities	2
Topological dimensions of random attractors for a stochastic reaction-diffusion equation with delay	2
On some differential equations involving a new kind of variable exponents	2
Positive solutions for a class of concave-convex semilinear elliptic systems with double critical exponents	2
Symmetric nonlinear solvable system of difference equations	2
The existence of solutions for the modified ( p ( x	2
Global boundedness and stabilization in a predator-prey model with cannibalism and prey-evasion	2
Global bifurcation curves of nonlocal elliptic equations with oscillatory nonlinear term	2
Existence and nonexistence of solutions for generalized quasilinear Kirchhoff–Schrödinger–Poisson system	2
On the logarithmic fractional Schrödinger–Poisson system with saddle-like potential	2
Prolongation of solutions and Lyapunov stability for Stieltjes dynamical systems	2

Rational solutions and limit cycles of polynomial and trigonometric Abel equations	2
Multiple nonsymmetric nodal solutions for quasilinear Schrödinger system	2
On a special case of a difference equation with powers	2
Ground-state solutions of a Hartree–Fock type system involving critical Sobolev exponent	2
Normalized solutions for Kirchhoff-type equations with combined nonlinearities: the L	2
Convergence of weak solutions of elliptic problems with datum in L 1	1
Linearized instability for differential equations with dependence on the past derivative	1
Study of singular elliptic equations with mixed boundary conditions and nonlocal source terms	1
Positive solutions for concave-convex type problems for the one-dimensional ϕ -Laplacian	1
Schrödinger–Hardy system without the Ambrosetti–Rabinowitz condition on Carnot groups	1
Slow divergence integral in regularized piecewise smooth systems	1
Global dynamics on a class of age-infection structured cholera model with immigration	1
Dynamics analysis of a diffusive prey-taxis system with memory and maturation delays	1
Sobolev inequality with non-uniformly degenerating gradient	1
Isolated periodic wave trains in a generalized Burgers–Huxley equation	1
Existence and uniqueness of solutions of a fourth-order boundary value problem with non-homogeneous boundary conditions	1
Normal forms for retarded functional differential equations associated with zero-double-Hopf singularity with 1 :	1
Existence and regularity of solutions for a singular anisotropic ( p , q	1
Addendum to Higher order stroboscopic averaged functions: a general relationship with Melnikov functions	1
Some results concerning a system of two max difference equations	1
The family of cubic differential systems with two real and two complex distinct infinite singularities and invariant straight lines of the type	1
Nonlinear integral inequalities involving Ψ -Hilfer fractional integrals and iterated fractional inte	1
Weighted L p -type regularity estimates for nonlinear parabolic equations with O	1
On a solvable class of nonlinear difference equations of fourth order	1
Existence of solution for a generalized Schrödinger–Poisson system via bifurcation theory	1
Limit cycles of planar piecewise linear Hamiltonian differential systems with two or three zones	1
Positive solutions of a Kirchhoff–Schrödinger--Newton system with critical nonlocal term	1
Infinitely many solutions for an anisotropic differential inclusion on unbounded domains	1
Oscillation of half-linear differential equations with mixed type of argument	1
Global attractivity of a higher order nonlinear difference equation with decreasing terms	1
Existence of positive solutions of elliptic equations with Hardy term	1
Multiple solutions for a class of Kirchhoff-type equation with critical growth	1
Ulam–Hyers stability and exponentially dichotomic equations in Banach spaces	1
Addendum to ``Ulam–Hyers stability and exponentially dichotomic equations in Banach spaces'' [Electron. J. Qual. Theory Differ. Equ. 2023, No. 8, 1–10]	1
Existence and exponential stability of periodic solutions of Nicholson-type systems with nonlinear density-dependent mortality and linear harvesting	1
Periodic and bounded solutions of functional differential equations with small delays	1
An implicit system of delay differential algebraic equations from hydrodynamics	1
Stability results for the functional differential equations associated to water hammer in hydraulics	1
Multiplicity of solutions of Kirchhoff-type fractional Laplacian problems with critical and singular nonlinearities	1
Solvability of thirty-six three-dimensional systems of difference equations of hyperbolic-cotangent type	1
On oscillation of solutions of scalar delay differential equation in critical case	1
Existence and multiplicity of eigenvalues for some double-phase problems involving an indefinite sign reaction term	1
Rational limit cycles of Abel differential equations	1
Multiple positive solutions for a fractional Kirchhoff type equation with logarithmic and singular nonlinearities	1
On the analytic commutator for Λ−Ω differential systems	1
New oscillation criteria for third order nonlinear functional differential equations	1
Weak center for a class of Λ –	1