Lopes SA. Primitive ideals and irreducible representations of $U_q(sl^+_4)$. Communications in Algebra. 2006;34(12):4523-4550.

[2014-17] Lopes SA, Lourenço JN. A multiparameter family of irreducible representations of the quantum plane and of the quantum Weyl algebra .Edit

Lopes SA. Separation of Variables for $U_q(\mathbfsl_n+1)^+$. Canadian Mathematical Bulletin. 2005;48(4):587-600.

[2015-17] Lopes SA. Non-Noetherian generalized Heisenberg algebras .

Lopes SA, Lourenço J.. A multiparameter family of irreducible representations of the quantum plane and of the quantum Weyl algebra. Portugaliae Mathematica. 2015;72:407-419.Edit

Lopes SA. Separation of variables for $U_q(\germsl_n+1)^+$. Canad. Math. Bull.. 2005;48:587-600.

[2016-29] Lopes SA, Kadison L, Hernandez A. A Quantum Subgroup Depth .Edit

Lopes SA. Primitive ideals of $U_q(\germ sl^+_n)$. Comm. Algebra. 2006;34:4523-4550.

Lopes SA. Non-Noetherian generalized Heisenberg algebras. Journal of Algebra and its Applications. 2017;16(4):1750064.