J.-F. Coulombel, “The Leray-Gårding method for finite difference schemes. II.: Smooth crossing modes”, NWEJM, no. 7, pp. 151–184, Oct. 2021, Accessed: Nov. 21, 2024. [Online]. Available: https://nwejm.univ-lille.fr/index.php/nwejm/article/view/24