Best constant approximants in Lorentz spaces. - Fabián E. Levis; Héctor Cuenya (J. Approx. Theory, 2004)

Interpolation and best simultaneous approximation. - Héctor Cuenya; Fabián E. Levis (J. Approx. Theory, 2010)

Weak inequalities for maximal functions in Orlicz-Lorentz spaces and applications. - Fabián E. Levis (J. Approx. Theory, 2010)

Maximal classes of matrices determining generalized inverses. - David E. Ferreyra; Fabián E. Levis; Néstor Thome (Appl. Math. Comput., 2018)

Extended best Lp-approximation is near-best approximation in Lq, p-1≤qp. - Federico Darío Kovac; Fabián E. Levis (J. Approx. Theory, 2022)

Strong uniqueness and alternation theorems for relative Chebyshev centers. - Fabián E. Levis; C. V. Ridolfi; L. Zabala (J. Approx. Theory, 2023)

Corrigendum to "Strong uniqueness and alternation theorems for relative Chebyshev centers" [J. Approx. Theory, 293 (2023) 105917]. - Fabián E. Levis; C. V. Ridolfi; L. Zabala (J. Approx. Theory, 2024)

On star-dagger matrices and the core-EP decomposition. - David E. Ferreyra; Fabián E. Levis; Saroj B. Malik; A. N. Priori (J. Comput. Appl. Math., 2024)

Best approximations and their extensions in Lorentz Gamma spaces. - Federico Darío Kovac; Fabián E. Levis; L. Zabala (J. Approx. Theory, 2025)