Construction of flat outputs of nonlinear discrete-time systems in a geometric and an algebraic frameworkKolar, Bernd; Kaldmäe, Arvo; Schöberl, Markus; Kotta, Ülle; Schlacher, KurtIFAC-PapersOnLine2016 / p. 796-801 https://doi.org/10.1016/j.ifacol.2016.10.263 Conference Proceedings at Scopus Article at Scopus Article at WOS