Dynamical systems and Lagrangian spaces. Obădeanu, V.; Albu, I.D. — 2000 Balkan Journal of Geometry and its Applications (BJGA)
Discrete Euler-Poincaré and Euler Poincaré-Poisson equations for semidirect products and principal bundles. Opriş, D.; Albu, I.D. — 1999 Balkan Journal of Geometry and its Applications (BJGA)
Mathematical model for diamond-type crystals with impurities or defects. Opriş, D.; Albu, I.D. — 1998 Balkan Journal of Geometry and its Applications (BJGA)