A Note on a Piecewise-Linear Duffing-Type System. - Gheorghe Tigan; Alessandro Astolfi (Int. J. Bifurc. Chaos, 2007)

Heteroclinic, Homoclinic and Closed Orbits in the Chen System. - Gheorghe Tigan; Jaume Llibre (Int. J. Bifurc. Chaos, 2016)

Degenerate Fold-Hopf Bifurcations in a Rössler-Type System. - Gheorghe Tigan; Jaume Llibre; Loredana Ciurdariu (Int. J. Bifurc. Chaos, 2017)

Analysis of Degenerate Chenciner Bifurcation. - Gheorghe Tigan; Sorin Lugojan; Loredana Ciurdariu (Int. J. Bifurc. Chaos, 2020)

Degenerate Chenciner Bifurcation Revisited. - Gheorghe Tigan; O. Brandibur; Emanuel-Attila Kokovics; Loredana Flavia Vesa (Int. J. Bifurc. Chaos, 2021)