How many k-step linear block methods exist and which of them is the most efficient and simplest one? - Higinio Ramos; Paul Popescu (Appl. Math. Comput., 2018)

Some new discretizations of the Euler-Lagrange equation. - Marcela Popescu; Paul Popescu; Higinio Ramos (Commun. Nonlinear Sci. Numer. Simul., 2021)

Noether Invariants for Nonholonomic Systems. - Marcela Popescu; Paul Popescu (Symmetry, 2021)

Extended Curvatures and Lie Algebroids. - Marcela Popescu; Paul Popescu (Symmetry, 2022)

On the Two Categories of Modules. - Marcela Popescu; Paul Popescu (Symmetry, 2022)