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  1. Generalized E-essential spectra of $$n\times n$$ block operator matrices and generalized perturbation theory

    Article • Rendiconti del Circolo Matematico di Palermo Series 2, December 2025, Springer Science + Business Media

    Professor Bilel Krichen

  2. Fixed point theory in RWC–Banach algebras

    Article • Nonlinear Analysis Modelling and Control, January 2025, Vilnius University Press

    Professor Bilel Krichen

  3. Generalized essential spectra involving the class of g-g-Riesz operators

    Article • Georgian Mathematical Journal, January 2024, De Gruyter

    Professor Bilel Krichen

  4. New existence result under weak topology for fractional differential equations

    Article • Advances in the Theory of Nonlinear Analysis and its Application, March 2023, Advances in the Theory of Nonlinear Analysis and its Application

    Professor Bilel Krichen , Professor Aref Jeribi

  5. Demicompactness perturbation in Banach algebras and some stability results

    Article • Georgian Mathematical Journal, October 2022, De Gruyter

    Professor Bilel Krichen , Professor Aref Jeribi

  6. Existence results for a system of nonlinear operator equations and block operator matrices in locally convex spaces

    Article • Georgian Mathematical Journal, January 2022, De Gruyter

    Professor Bilel Krichen

  7. Weakly demicompact linear operators and axiomatic measures of weak noncompactness

    Article • Mathematica Slovaca, December 2019, De Gruyter

    Professor Bilel Krichen

  8. Fixed point theory in fluid mechanics: an application to the stationary Navier–Stokes problem

    Article • Journal of Pseudo-Differential Operators and Applications, October 2016, Springer Science + Business Media

    Professor Bilel Krichen