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 2022-06-01 to 2026-06-01.)

Article	Citations
Complex oscillations of non-definite Sturm-Liouville problems, II	18
Global boundedness in a quasilinear predator–prey chemotaxis system with nonlinear indirect signal production	5
Multiplicity of solutions for p ( x 5
Two regularity criteria of the 3D magneto-micropolar equations in Vishik spaces	4
On the integrability and dynamics of the Hide, Skeldon and Acheson differential system	4
On a special case of a difference equation with powers	3
Biharmonic system with Hartree-type critical nonlinearity	3
Sharp results for oscillation of second-order neutral delay differential equations	3
Bifurcations and Turing patterns in a diffusive Gierer–Meinhardt model	3
New nonlinear Henry–Gronwall type inequality with time-varying delay and applications to fractional differential equations	3
Symmetric nonlinear solvable system of difference equations	3
Critical points of locally Lipschitz functionals inside and outside the ordered interval	3
Global boundedness and stabilization in a predator-prey model with cannibalism and prey-evasion	2
Ground-state solutions of a Hartree–Fock type system involving critical Sobolev exponent	2
Prolongation of solutions and Lyapunov stability for Stieltjes dynamical systems	2
On a Dirichlet boundary value problem for an Ermakov–Painlevé I equation. A Hamiltonian EPI system	2
Multiple positive solutions for a fractional Kirchhoff type equation with logarithmic and singular nonlinearities	2
New stability criteria for periodic planar Lotka–Volterra systems	2
Existence and uniqueness of solutions of a fourth-order boundary value problem with non-homogeneous boundary conditions	2
Topological dimensions of random attractors for a stochastic reaction-diffusion equation with delay	2
Normalized solutions for a fractional coupled critical Hartree system	2
Rational solutions and limit cycles of polynomial and trigonometric Abel equations	2
Normalized solutions for Kirchhoff-type equations with combined nonlinearities: the L	2
Global bifurcation curves of nonlocal elliptic equations with oscillatory nonlinear term	2
On the kernel of the Stieltjes derivative and the space of bounded Stieltjes-differentiable functions	2

Rational limit cycles of Abel differential equations	2
On the logarithmic fractional Schrödinger–Poisson system with saddle-like potential	2
Positive solutions for a class of concave-convex semilinear elliptic systems with double critical exponents	2
Homoclinic solutions for a class of asymptotically autonomous Hamiltonian systems with indefinite sign nonlinearities	2
Infinitely many solutions for an anisotropic differential inclusion on unbounded domains	2
Global attractivity of a higher order nonlinear difference equation with decreasing terms	2
Configurations of quadratic systems possessing three distinct infinite singularities and one or more invariant parabolas	2
Existence and nonexistence of solutions for generalized quasilinear Kirchhoff–Schrödinger–Poisson system	2
Existence and regularity of solutions for a singular anisotropic ( p , q	1
The blow-up method applied to monodromic singularities	1
Systems of second order Stieltjes differential equations with three-point boundary conditions	1
Some results concerning a system of two max difference equations	1
Existence of normalized solutions for the nonlinear Schrödinger–Poisson–Boltzmann system	1
Linearized instability for differential equations with dependence on the past derivative	1
Multiplicity of solutions of Kirchhoff-type fractional Laplacian problems with critical and singular nonlinearities	1
Combined effects of singular attractive and asymptotically linear terms in Kirchhoff equations	1
Existence of two infinite families of solutions to a singular superlinear equation on exterior domains	1
Center manifolds for random dynamical systems with generalized trichotomies	1
A study on the oscillation of second-order neutral differential equations in noncanonical form	1
Addendum to Higher order stroboscopic averaged functions: a general relationship with Melnikov functions	1
Global dynamics on a class of age-infection structured cholera model with immigration	1
Multiple normalized solutions for ( 2 , q )<	1
Existence of solution for a generalized Schrödinger–Poisson system via bifurcation theory	1
Optimal C	1
Slow divergence integral in regularized piecewise smooth systems	1
Convergence of weak solutions of elliptic problems with datum in L 1	1
Decreasing solutions of cyclic second-order difference systems	1
Existence and regularity of pullback attractors for a 3D non-autonomous Navier–Stokes–Voigt model with finite delay	1
Nonlinear integral inequalities involving Ψ -Hilfer fractional integrals and iterated fractional inte	1
Theodore A. Burton (1935–2025)	1
Existence of positive solutions of a semipositone problem with Minkowski-curvature operator	1
Existence and exponential stability of periodic solutions of Nicholson-type systems with nonlinear density-dependent mortality and linear harvesting	1
Necessary and sufficient conditions for one-dimensional variational problems with applications to elasticity	1
Nonexistence and existence of solutions for a Choquard–Kirchhoff type equation involving mixed local and nonlocal operators	1
On the analytic commutator for Λ−Ω differential systems	1
Study of singular elliptic equations with mixed boundary conditions and nonlocal source terms	1
Multiple solutions for a fractional ( p	1
Periodic solutions in a linear delay difference system	1
Normal forms for retarded functional differential equations associated with zero-double-Hopf singularity with 1 :	1
Normalized solutions for Schrödinger equations with potential and general nonlinearities involving critical case on large convex domains	1
On uniform asymptotic h -stability for li	1
Unilateral global bifurcation for an overdetermined problem in	1
Positive solutions for concave-convex type problems for the one-dimensional ϕ -Laplacian	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
Dynamics analysis of a diffusive prey-taxis system with memory and maturation delays	1
Existence of positive solutions of elliptic equations with Hardy term	1
The family of cubic differential systems with two real and two complex distinct infinite singularities and invariant straight lines of the type	1
An implicit system of delay differential algebraic equations from hydrodynamics	1
Some new results for the smoothness of topological equivalence in uniformly asymptotically stable systems	1
Schrödinger–Hardy system without the Ambrosetti–Rabinowitz condition on Carnot groups	1

On Shilnikov's scenario in 3D: Topological chaos for vectorfields of class C 1	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
New oscillation criteria for third order nonlinear functional differential equations	1
Sign-changing solution for critical Schrödinger–Poisson system with concave perturbation	1