Double-scroll attractors were known sinceone was proposed by Otto Rössler  or the Chua circuit was designed but it is possible to produce a larger number of scrolls. This was completed for the first time, at least for the non-autonomous case, by Aziz Alaoui in 1999 . Among other systems he proposed, we here present the one as follows
which produces a genus-5 multispiral attractor as shown in Fig. 1 for parameter values
The attractor is here shown in the - plane projection. Its topological analysis is provided in .
 O. E. Rössler, Continuous chaos,. In : Haken H, editor. Synergetics, Proceedings of the international workshop on synergetics at schloss Elmau (Bavaria, 2–7 May 1977). Springer-Verlag, pp. 184-197, 1977.
 M. A. Aziz-Alaoui, Differential equations with multispiral attractors, International Journal of Bifurcation & Chaos, 9, 1009-1039, 1999.
 M. Rosalie & C. Letellier, Toward a general procedure for extracting templates from chaotic attractors bounded by high genus torus, International Journal of Bifurcation & Chaos, 24 (4), 1450045, 2014.