1. Explosions of Strange attractors exhibited by Duffing equation;Ueda;Ann. N.Y. Acad. Sci.,1980
2. Randomly transitional phenomena in the systems governed by Duffing's equation;Ueda;J. Statistical Physics,1979
3. Steady motions exhibited by Duffing's equation: a picture book of regular and chaotic motions;Ueda,1980
4. On strange behaviour of solutions of Duffing's equation;Krykov;Doklady Akademi Nauk SSSR,1981
5. Chaotische Bewegungen bein Duffing Schwinger;Popp;Festaschrift zum 70 Geburstag von Herrn prof. K. Magnus,1982