00705nam0-22002651i-450-990001003500403321000100350FED01000100350(Aleph)000100350FED0100010035020000920d1968----km-y0itay50------baengDynamical Systems in the PlaneOtomar HajekLondon [etc.]Academic Press1968Meccanica classica531Hajek,Otomar12946ITUNINARICAUNIMARCBK99000100350040332124-0476199FI1FI1Dynamical systems in the plane117474UNINAING01