Dynamical systems and bifurcations proceedings of a workshop held in Groningen, the Netherlands, April 16-20, 1984 / edited by B.L.J. Braaksma, H.W. Broer, and F. Takens. - Braaksma, B. L. J. (Boele Lieuwe Jan), 1934-; Broer, H. W. (Hendrik Wolter), 1950-; Takens, Floris (Lecture notes in mathematics (Springer-Verlag) ;, 1985)