The transversal creeping vibrations of a nonhomogeneous beam with fractional derivative order constitutive relation. Hedrih, Katica — 2006 Mathematical Problems in Engineering
O uzajamnom uticaju harmonika u nelinearnim sistemima sa malim parametrom Katica Hedrih; Predrag Kozić; Ratko Pavlović — 1984 Zbornik Radova