A system governed by a set of nonautonomous differential equations with robust strange nonchaotic attractor of Hunt and Ott typeValentina M. Doroshenko and Sergey P. KuznetsovEur. Phys. J. Special Topics, 226 9 (2017) 1765-1775DOI: https://doi.org/10.1140/epjst/e2017-70041-y