"Omitting types algebraicaly and more about amalgmation for modal cylindric algebras",
*Mathematical Logic Quarterly*, vol. 67, issue 3, pp. 295-312, 2021.

"Omitting types for fragments and extensions of first order logic",
*Bulletin Section of Logic*, vol. 50, issue 3, pp. 249-267, 2021.
9884-article_text-25744-2-10-20211028.pdf

"On complete representations and minimal completions for cylindric like algebras-both positive and negative results",
*Bulletin section of logic*, vol. 1, issue 50, pp. 465-511, 2021.
8145-article_text-26603-1-10-20210720_5.pdf

"Algebraic Logic and Topoi, a Philosophical Holistic Approach",
*I.J of Algebra*, vol. 12, issue 2, pp. 43-137, 2020.
ahmedija1-4-2020-2.pdf

"Atom canonicity and first order definability in algebras of relation",
*Studia Scientiarum Mathematicarum Hungarica*, vol. 67, issue 3, pp. 1-51, 2020.
4220.pdf

"A brief history of Tarskian algebraic logic with new perspectives and technical innovations",
*Bolletino dell Unione Matematica Italiana*, vol. 13, pp. 381-416, 2020.
10.1007_s40574-020-00240-x_4.pdf

"Existence of finite relation algebras implies failure of the omitting types theorem",
*Notre Dame of formal logic*, vol. 61, issue 4, pp. pp.503--519, 2020.
notre00294527-2020-0022.pdf

"Geometrical representation theorems for cylindric-type algebras",
*Questiones mathematicea*, vol. 43, issue 1, pp. 81-96., 2020.

"Interpolation and amalgmation in modal cylindric algebras",
*Questiones mathematicea*, vol. 43, issue 9, pp. p.1209-1238, 2020.
interpolation_and_amalgamation_in_modal_cylindric_algebras.pdf

"Non elementary classes of Relation and Cylindric Algebras",
*I.Journal of Algebra*, vol. 14, issue 1, pp. 1-42, 2020.
ahmedija1-4-2020.pdf

"On non finite axiomatizability of n modal logics between K^n and S5^n for finite n\geq 3",
*JP Journal of algebra, number Theory and applications*, vol. 47, issue 1, pp. 99-119, 2020.

"Geometric representability results for cylindric-like algebras by games",
*Quaestiones Mathematicea on Line*, 2019.
geometrical-representation-theorems.pdf

"On the multi-modal logic of substitutions",
*Studia Scientiarum Mathematicarum Hungarica*, vol. 56, issue 4, pp. 454--481, 2019.
t2.pdf

"Various notions of representability for cylindric and polyadic algebras",
*Studia Scientiarum Mathematicarum Hungarica*, vol. 56, issue 3, pp. 335-363, 2019.
elementary2.pdft4.pdf

"Splitting atoms in algebraic logic in connection to atom-canonicity,first order definability and non-finite axiomatizability",
*3rd conference, Logic, Relativity and Beyond*, 24 August 2017.
budapestfinal.pdf

"Yet Some More Non-Finite Exiomatizability Results for Algebras of Relations and Ways To Avoid Them",
*Studia Scientiarum Mathematicarum Hungarica*, vol. 53, issue 3, pp. 322-378, 2016.
t3.pdf

"A universal approach to omitting types theorems",
*@nd conference of Logic and relativity and beyond*, 10 August, 2015.
ott3.pdf

"On notions of representability for cylindric and polyadic algebras, and a solution to the finitizability problem for L_{\omega,\omega}",
*Mathematical Logic Quarterly*, vol. 61, pp. 418-477, 2015.
Representability2015.pdftarek_2015_representability.pdf

"Varying Interpolation and Amalgamation in Polyadic MV -Algebras",
*Journal of Applied Non-Classical Logics*, vol. 25, issue 2, pp. 140-192, 2015.
MV_ Algebras.pdf

"Neat Embeddings as adjoint situations",
*Synthese*, vol. 192, issue 5, pp. 2223-2256, 2015.
tarek_sayed_ahmed_synthese_2.pdf

"Splitting Methods in Algebraic Logic",
* www.renyi.hu/conferences/lrb15/LRB15*, 2015.
bulletinsh.pdfbulletinshpart2.pdfbudapestfinal.pdf