On Ulam-Hyers Stability for a System of Partial Differential Equations of First Order. - Daniela Marian; Sorina Anamaria Ciplea; Nicolaie Lungu (Symmetry, 2020)

Optimal and Nonoptimal Gronwall Lemmas. - Daniela Marian; Sorina Anamaria Ciplea; Nicolaie Lungu (Symmetry, 2020)

On a Functional Integral Equation. - Daniela Marian; Sorina Anamaria Ciplea; Nicolaie Lungu (Symmetry, 2021)