FRITZSCHE, K.; RÖBENACK, K.; GUO, Y. Flat input based canonical form observers for non-integrable nonlinear systems. SYSTEM THEORY, CONTROL AND COMPUTING JOURNAL, Craiova, Romania, v. 2, n. 1, p. 13–21, 2022. DOI: 10.52846/stccj.2022.2.1.31. Disponível em: https://stccj.ucv.ro/index.php/stccj/article/view/31. Acesso em: 1 feb. 2023.