Bonheure, Denis, José Ángel Cid, Colette De Coster, and Luís Sanchez. “Heteroclinics for Non Autonomous Third Order Differential Equations”. Topological Methods in Nonlinear Analysis 43, no. 1 (April 12, 2016): 53–68. Accessed April 24, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2014.004.