Multitime linear-quadratic regulator problem based on curvilinear integral. Udrişte, Constantin; Ţevy, Ionel — 2009 Balkan Journal of Geometry and its Applications (BJGA)
Integrator for Lagrangian dynamics. Udrişte, C.; Postolache, M.; Ţevy, I. — 2001 Balkan Journal of Geometry and its Applications (BJGA)
Abstract linear dependence. Dogaru, O.; Doroftei, M.; Ţevy, I.; Dogaru, V. — 1998 Balkan Journal of Geometry and its Applications (BJGA)
Extrema with constraints on points and/or velocities. Udrişte, C.; Dogaru, O.; Ferrara, M.; Ţevy, I. — 2003 Balkan Journal of Geometry and its Applications (BJGA)